Wikidata:Database reports/identical birth and death dates/1

These are pairs of items with identical dates in date of birth (P569) and date of death (P570). Some should be merged (duplicates), others not: different persons with the same dates (coincidence or virtual twins) or incorrect dates (mixup).

The list is updated regularly (daily?) by bot (items with corrected or removed dates can take a few days to be removed from the list).

• A formatted version is at selection (1)
• Different people with identical dates are listed at false positives. A list of "virtual twins" was developed from that.
• For a status, see Wikidata talk:Database reports/identical birth and death dates

How probable are false positives?

• (A) Items for people with both dates: 3,009,985 ^ref
• (B) Items for people with two people with the same date of birth and date of death (Q20978290): 3,145 ^ref
• Ratio (B/A): 1.04 ‰
• (C) There are 301,172 ^ref redirects to items with both dates, i.e. two items were merged
• Ratio (C/A): 10.01 %
• False positives (B/C): 1.04 % (This underestimates it as it assumes that all items had both dates before being merged).

Items in the list below could be:

Type	Sample	Suggested approach
Items about the same person	John Casimir, Count of Erbach-Breuberg (Q19902526) sitelink to enwiki Johan Casimir van Erbach (Q3917172) sitelink to nlwiki	merge the two items
Items about the same person	Henri Verdun (Q3132140) sitelink to frwiki Maurice Castellain (Q5604715) sitelink to svwiki	merge the two items
Items about the same person	Charles Henry of Nassau-Siegen (Q64055) sitelink to enwiki redirect Charles Henry of Nassau-Siegen (Q16858083) sitelink to enwiki article	delete the redirect-sitelink and merge the two items. Special:MergeItems can sometimes merge them directly.
Items about the same person	Karl Gottlieb von Windisch (Q927307) items with sitelinks Karl Gottlieb von Windisch (Q1465093) sitelink manually moved, but item not redirect	merge the two items
Items about the same person	Peter Lamberg (Q5932605) sitelink to svwiki (disambiguation page) Peter Lamberg (Q19976026) sitelink to svwiki article	delete the sitelink to the disambiguation page and merge the two items (sitelink didn't get updated on pagemove) find a new item for the disambiguation page or create it
Items about likely about the same person, but this isn't conclusive	Paul Hofmann (Q90030) and Paul Gutike (Q55681910) Eyre Turquand (Q65807514) and Ellen Eyre Turquand (Q72890320)	add said to be the same as (P460) to each, do not merge them
Items about different people, with incorrect dates and possibly mixed-up sitelinks	Yrjö Saarinen (Q11903052) and Yrjö R. Saarinen (Q11903045) Aleksander Thomson (Q3742060) and Aleksander Thomson (Q16406815)	correct dates and/or fix sitelinks. Don't merge. If in doubt, use the articles' talk pages or WD:IWC
Items about a person and items with dates they shouldn't have	Sigmund Freud (Q9215) Biography of Sigmund Freud (Q2904119)	remove dates from the item that shouldn't have them
Items for identical persons, but with two articles at the same Wikipedia	Olavi Merinen (Q11885292) with article at fiwiki Olavi Merinen (Q17382548) with another article at fiwiki	possibly suggest to Wikipedia to merge both adding Template:Merge (Q6919004) to each article mark one with instance of (P31): Wikimedia duplicated page (Q17362920) and qualifier of (P642) linking to the other item Alternatively, interlink both with said to be the same as (P460) possibly move statements to the one item that isn't marked with Wikimedia duplicated page (Q17362920) Once the merge of the articles completed, the items can be merged
False positives: two different persons, with same dates of birth and death	Étienne Bernand (Q7121177) and André Bernand (Q19953021) Harry Elkins Widener (Q511212) and Juozas Montvila (Q4301999) Robun Kanagaki (Q1723541) and James MacGregor (Q6138639)	double-check dates, ideally with references interlink both items with different from (P1889) and qualify with criterion used (P1013) = two people with the same date of birth and date of death (Q20978290) add items to False_positives
Already merged/fixed	some of the below (items redirected, labels and statements appear then as identical)	do nothing ;)

Steps:

• Are both items about the same person?
  • If yes:
    • Can the items be merged?
      • If yes: merge them. In the next update, the pair will disappear from the list
      • If no: tag the two articles at Wikipedia for merging. In the next update, the pair will be moved to the "marked for merging" section of the main list.
  • If no:
    • Are the instance of (P31) values correct?
      • If no: correct them
    • Should the item have date of birth (P569)/date of death (P570)?
      • If no: remove them. In one of the next updates, the pair will disappear from the list.
    • Are the dates correct?
      • If no: correct them. In one of the next updates, the pair will disappear from the list.
      • If yes: add the pair to "false positives". In the next update, the pair will disappear from the list.

Update frequency:

• Removal of merged items: generally daily
• Removal of items marked as different: generally daily
• Removal of items with corrected dates: generally weekly (based on Wikidata dumps)
• Merge of items identified as duplicates and marked for merging at a Wikipedia (if they still include identical dates): occasionally by bot once the merger at Wikipedia is completed.
• Addition of newly identified items: generally weekly (based on Wikidata dumps)

Tools:

• Note Markasduplicate

DOB	DOD	Merged	Person 1	Person 2	P31 (#1)	P31 (#2)	P21 (#1)	P21 (#2)	P27 (#1)	P27 (#2)	P106 (#1)	P106 (#2)	Diff from	TO DO
7 October 1853, 4 November 1868 4 November 1868	30 May 1917, 20 March 1939 20 March 1939		František Jaroslav Rypáček	Karel Ryska	human	human	male	male	Austria-Hungary		pedagogue, writer, poet, teacher, historian, literary historian, local historian, high school teacher, editing staff	technician	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 March 1887	17 November 1940 17 November 1940		Jamaluddin	Muhammad Kasyful Anwar	human	human	male	male	Indonesia	Indonesia	'ālim	'ālim	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1893 20 July 1893	13 October 1955 13 October 1955		Eusebio Fernández Muñiz	Facundo Pascual Quilis	human	human	male	male	Spain		businessperson, sports executive		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 June 1911 1929, 30 June 1911	14 August 2004 20 January 2022, 14 August 2004		Czesław Miłosz	Jerzy Waglewski	human	human	male	male	Poland, United States of America, Lithuania		poet, diplomat, writer, essayist, translator, pedagogue, university teacher, literary historian		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 November 1933	21 May 2024		Vladimir Agapov	Vladimir Agapov	human	Wikimedia human name disambiguation page	male		Soviet Union		association football player, association football coach		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
10 November 1994 10 November 1994	24 October 2020 24 October 2020		no label	no label	human	human	male		Azerbaijan		military personnel		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
2 January 1616 2 January 1616	23 March 1664 23 March 1664		Adam Volckmann	Adam Volckmann	human	human	male	male			jurist	jurist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
5 February 1783 5 February 1783	20 February 1815 20 February 1815		Sophie Silfversparre	Sophie Silfversparre	human	human	female	female	Sweden	Sweden	artist, maid of honour	artist, maid of honour	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1 August 1785 1 August 1785	7 April 1860 7 April 1860		Georg Adam Prinz von Starhemberg	Georg Adam Prinz von Starhemberg	human	human	male	male					-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1 May 1796 1 May 1796	30 November 1852 30 November 1852		Junius Brutus Booth	Lādin Ali al-Qatani	human	human	male	male	United Kingdom of Great Britain and Ireland, Kingdom of Great Britain		actor, stage actor		Junius Brutus Booth, Lādin Ali al-Qatani - Junius Brutus Booth	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
10 June 1804 10 June 1804	10 August 1890 10 August 1890		Johann Krajčik	Johann Krajčik	human	human	male	male			theologian, jurist, titular bishop, priest	theologian, jurist, titular bishop, priest	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
14 January 1805 14 January 1805	10 November 1860 10 November 1860		Friedrich Karl Ludwig Graf zu Ortenburg	Friedrich Karl Ludwig Graf zu Ortenburg	human	human	male	male					-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
27 October 1807 27 October 1807	1 May 1886 1 May 1886		Charles Lemettre	Amelie Lambelin	human	human	male	female			cooper		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
16 April 1815 16 April 1815	8 November 1878, 11 August 1878 8 November 1878		Edward Laenen	Edouard Lavergne	human	human	male					visual artist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
14 March 1818 14 March 1818	20 April 1885 20 April 1885		Christian Marinus Poulsen	Christian Marinus Poulsen	human	human	male	male	Kingdom of Denmark	Kingdom of Denmark	mineralogist, teacher, botanist	mineralogist, teacher, botanist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
22 May 1822 22 May 1822	3 March 1890 3 March 1890		Joseph Vecsey von Vecse und Böröllyő-Iságfa	Joseph Vecsey von Vecse und Böröllyő-Iságfa	human	human	male	male			military officer	military officer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 December 1824 28 December 1824	17 July 1901 17 July 1901		Charles Mohr	Charles Mohr	human	human	male	male	United States of America	United States of America	botanist, pharmacist, bryologist	botanist, pharmacist, bryologist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 March 1827 30 March 1827	20 January 1911 20 January 1911		Charles Lee	Charles Lee	human	human	male	male			clergy, writer	clergy, writer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
3 October 1831 3 October 1831	28 August 1904 28 August 1904		Friedrich Albrecht Ludwig Franz Graf zu Ortenburg	Friedrich Albrecht Ludwig Franz Graf zu Ortenburg	human	human	male	male					-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
19 November 1831 19 November 1831	19 September 1881 19 September 1881		James A. Garfield	Aboud bin Lādin	human	human	male	male	United States of America		politician, military officer, lawyer, statesperson, writer		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
10 February 1856 10 February 1856	20 March 1942 20 March 1942		Seymour John Fortescue	Seymour John Fortescue	human	human	male	male	United Kingdom	United Kingdom			-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
15 November 1858 15 November 1858	15 November 1925 15 November 1925		Edvard Vohnout	Edvard Vohnout	human	human	male	male	Czechoslovakia, Cisleithania	Czechoslovakia, Cisleithania	teacher, choir director, composer	teacher, choir director, composer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
17 March 1859 17 March 1859	19 February 1941 19 February 1941		Paul Hugo Isidor Kahl	Paul Hugo Isidor Kahl	human	human	male	male	United States of America	United States of America	entomologist	entomologist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
24 December 1862 24 December 1862	1 March 1938 1 March 1938		Wilhelm Mönkemeyer	Wilhelm Mönkemeyer	human	human	male	male			botanist, bryologist, gardener	botanist, bryologist, gardener	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 February 1865 18 February 1865	22 October 1934 22 October 1934		Harper Havelock Coates	Harper Havelock Coates	human	human	male	male	Canada	Canada	missionary	missionary	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 April 1866 21 April 1866	19 October 1935 19 October 1935		Krishnalal Bysack	Krishnalal Bysack	human	human	male	male	British Raj	British Raj	circus performer, writer, businessperson, gymnast	circus performer, writer, businessperson, gymnast	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
22 November 1868 22 November 1868	26 May 1936 26 May 1936		Heribert Holzapfel	Heribert Holzapfel	human	human	male	male			historian, Catholic priest, theologian, church historian, bryologist, botanist	historian, Catholic priest, theologian, church historian, bryologist, botanist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
2 December 1868 2 December 1868	13 July 1947 13 July 1947		Alfred Bornmüller	Alfred Bornmüller	human	human	male	male	Germany	Germany	botanist, botanical collector, scientific explorer	botanist, botanical collector, scientific explorer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 February 1873 21 February 1873	25 October 1948 25 October 1948		Virginie Soetaert	Hanna Ubbelohde	human	human	female	female				artist, handicrafter	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1875 20 July 1875	1932, 13 March 1932 13 March 1932		Antonin Schlesinger	Hans Schlesinger	human	human	male	male			Catholic priest	painter	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
7 April 1876 7 April 1876	18 September 1956 18 September 1956		Illarion Semjonovitsj Sventsitskiy	Illarion Semjonovitsj Sventsitskiy	human	human	male	male	Austria-Hungary, West Ukrainian People's Republic, Ukrainian People's Republic, Second Polish Republic, Soviet Union, Ukrainian State	Austria-Hungary, West Ukrainian People's Republic, Ukrainian People's Republic, Second Polish Republic, Soviet Union, Ukrainian State	philologist, museologist, slavist, art historian, palaeographer	philologist, museologist, slavist, art historian, palaeographer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 January 1881 20 January 1881, 10 April 1939	14 January 1982 14 January 1982		Ernst Dubach	Albert Dubach	human	human	male	male	Switzerland	Switzerland	sport cyclist	sport cyclist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 November 1886 30 November 1886	30 June 1971 30 June 1971		Albert Michael Jörissen	Albert Michael Jörissen	human	human	male	male			painter	painter	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 August 1888 9 August 1888	11 February 1962 11 February 1962		Josef Karl Weese	Josef Karl Weese	human	human	male	male	Austria-Hungary, Nazi Germany, Austria	Austria-Hungary, Nazi Germany, Austria	lichenologist, botanist, bryologist	lichenologist, botanist, bryologist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
17 December 1889 17 December 1889	9 May 1951 9 May 1951		Yakov Chernikhov	Yakov Chernikhov	human	human	male	male	Russian Empire, Soviet Union	Russian Empire, Soviet Union	architect, designer, painter, graphic artist, art theorist, pedagogue	architect, designer, painter, graphic artist, art theorist, pedagogue	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 August 1890	9 May 1972		A. C. and Mamie Forehand	A. C. Forehand	spouse duo, musical duo	human		male		United States of America		singer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
16 December 1892 16 December 1892	5 September 1974 5 September 1974		Felix Joseph Widder	Felix Joseph Widder	human	human	male	male	Austria	Austria	botanist, mycologist	botanist, mycologist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
27 February 1894 27 February 1894	14 July 1980 14 July 1980		Branislav Manica	Branislav Manica	human	human	male	male	Austria-Hungary, Czechoslovakia	Austria-Hungary, Czechoslovakia	soldier	soldier	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
2 February 1896, 9 February 1896 9 February 1896	7 August 1942 7 August 1942		Štěpán Adler	Rudolf Liebl	human	human	male	male					Rudolf Liebl - Štěpán Adler	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 August 1902 18 August 1902	10 April 1978 10 April 1978		Vojtěch Tilkovský	Vojtěch Tilkovský	human	human	male	male			art historian, historian, publisher, opinion journalist, teacher, art writer	art historian, historian, publisher, opinion journalist, teacher, art writer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 January 1903 28 January 1903, 1903	15 March 1978 15 March 1978, 1978		Aleksander Kamiński	Juliusz Górecki	human	human	male		Poland		historian		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 February 1903 21 February 1903	10 December 1995 10 December 1995		Jožka Králíková	Josefa Mattesová	human	human	female	female			opera singer	librarian	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
6 January 1904 6 January 1904	23 February 1970 23 February 1970		Carl Koch	Carl Koch	human	human	male	male	Austria, Cisleithania	Austria, Cisleithania	entomologist	entomologist	Carl Koch - Carl Koch	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
4 May 1904 4 May 1904	15 July 1943 15 July 1943		Enrique Molina Soler	Enrique Molina Soler	human	human	male	male			association football player	association football player	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
3 November 1906 3 November 1906	3 February 1978 3 February 1978		Martin Vietor	Martin Vietor	human	human	male	male					-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
13 September 1911 13 September 1911	12 May 2001 12 May 2001		Raymond Vincentini	Raymond Vincentini	human	human	male	male	France	France	association football referee	association football referee	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
11 November 1911 11 November 1911	17 April 1964 17 April 1964		Nawal Kishore Dhawal	Mikołaj Kokozow	human	human	male	male	India, British Raj, Dominion of India	Poland	writer	architect	Mikołaj Kokozow - Nawal Kishore Dhawal	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
4 April 1915 4 April 1915	21 October 2007 21 October 2007		François Chamoux	François Chamoux	human	human	male	male	France	France	art historian, archaeologist, classical philologist, classical archaeologist, university teacher	art historian, archaeologist, classical philologist, classical archaeologist, university teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1916 1916	1993 1993		Vanda Mozheiko	Anna Bogush	human	human	female	female	Belarus	Belarus			-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 February 1917 18 February 1917	5 August 2003 5 August 2003		Ottilia Grubenmann	Ottilia Grubenmann	human	human	female	female	Switzerland	Switzerland	midwife	midwife	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 February 1920 9 February 1920	8 May 2008 8 May 2008		Alexey Skvortsov	Alexey Skvortsov	human	human	male	male	Soviet Union, Russia	Soviet Union, Russia	botanist	botanist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
19 May 1920, 18 May 1920 19 May 1920, 18 May 1920	18 March 2003 18 March 2003		Karl Keller	Karl Keller	human	human	male	male	Switzerland	Switzerland	architect, master builder, master builder, master builder	architect, master builder, master builder, master builder	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
29 December 1922 29 December 1922	14 September 1985 14 September 1985		László Borbély	László Borbély	human	human	male	male	Hungary	Hungary	journalist	journalist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
2 April 1925 2 April 1925	26 April 1991 26 April 1991		Thaddeus Anthony Shubsda	Thaddeus Anthony Shubsda	human	human	male	male	Poland	Poland	Catholic priest, Catholic bishop	Catholic priest, Catholic bishop	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 September 1929 1929	5 August 1986 1986		Francis Zagorskis	Willie Patterson	human	human	male	male	Latvia	United Kingdom	scientist, farmer	comics artist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
5 September 1930 5 September 1930	16 March 2015 16 March 2015		Joaquim Molas	Emili Segués	human	human	male	male	Spain		university teacher, literary historian, writer, philologist, literary critic		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
10 August 1931 10 August 1931	14 September 2014 14 September 2014		Kireet Joshi	Kireet Joshi	human	human	male	male	India, British Raj, Dominion of India	India, British Raj, Dominion of India	philosopher, adviser, teacher	philosopher, adviser, teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
7 January 1934 7 January 1934	7 March 2011 7 March 2011		Wolfram Schultze-Motel	Wolfram Schultze-Motel	human	human	male	male	Germany	Germany	botanist, botanical collector, curator, university teacher, bryologist	botanist, botanical collector, curator, university teacher, bryologist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
4 March 1938 4 March 1938	6 July 2010 6 July 2010		Tone Wraber	Tone Wraber	human	human	male	male	Slovenia, Socialist Federal Republic of Yugoslavia, Kingdom of Yugoslavia	Slovenia, Socialist Federal Republic of Yugoslavia, Kingdom of Yugoslavia	botanist, university teacher	botanist, university teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 January 1940 20 January 1940	30 January 2008 30 January 2008		Faiq İlahi oğlu Cəfərov	Tribikram Mallik	human	human	male	male	Soviet Union, Azerbaijan	British Raj, India, Dominion of India	scientist	politician	Tribikram Mallik - Faiq İlahi oğlu Cəfərov	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
4 February 1944 4 February 1944	20 May 2024 20 May 2024		Mario Mitrotti	Mario Mitrotti	human	human	male	male	Panama, Colombia	Panama, Colombia	film director, television director, commercial director, film producer, television producer, documentary filmmaker	film director, television director, commercial director, film producer, television producer, documentary filmmaker	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
23 June 1945 23 June 1945	30 July 2005 30 July 2005		John Garang	John Garang	human	human	male	male	Sudan	Sudan	politician, partisan	politician, partisan	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
11 October 1948 11 October 1948	10 September 1971 10 September 1971		Lynn Cecilia Eusan	Lynn Cecilia Eusan	human	human	female	female			journalist	journalist	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 July 1996 18 July 1996	28 September 2020 28 September 2020		no label	no label	human	human	male	male	Azerbaijan	Azerbaijan	military personnel	military personnel	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
14 October 2010 14 October 2010	21 January 2022 21 January 2022		Ethan Yap E Chern	Aston Yap Kai Shern	human	human	male	male	Singapore	Singapore			Aston Yap Kai Shern - Ethan Yap E Chern	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2