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: 2,638,279 ref
- (B) Items for people with two people with the same date of birth and date of death (Q20978290): 2,283 ref
- Ratio (B/A): 0.87 ‰
- (C) There are 231,809 ref redirects to items with both dates, i.e. two items were merged
- Ratio (C/A): 8.79 %
- False positives (B/C): 0.98 % (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 |
| merge the two items |
Items about the same person |
| merge the two items |
Items about the same person |
| delete the redirect-sitelink and merge the two items. Special:MergeItems can sometimes merge them directly. |
Items about the same person |
| merge the two items |
Items about the same person |
| 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 | 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 | 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 | remove dates from the item that shouldn't have them | |
Items for identical persons, but with two articles at the same Wikipedia |
| 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 |
double-check dates, ideally with references | |
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.
- Can the items be merged?
- 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.
- Are the instance of (P31) values correct?
- If yes:
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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
8 December 1917 8 December 1917 |
8 January 2009 8 January 2009 |
Irène Mélikoff | İrene Melikoff | human | human | female | female | France | linguist, turkologist | scientist | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||
24 June 1921 24 June 1921 |
11 April 1979 11 April 1979, 1979 |
Nasser Moghadam | Ali Hojjat Kashani | human | human | male | male | Iran | Iran | politician | politician | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
|
24 October 1933 |
17 March 1995 |
Kray twins | Ronnie Kray | identical twins, sibling duo, crime family | human, twin | male | United Kingdom | gangster | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||||
21 October 1851 1851, 21 October 1851 |
24 May 1918 1918, 24 May 1918 |
Francisco Sánchez Araciel | Manuel Sanchez Araciel | human | human | male | male | Spain | Spain | sculptor | sculptor | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
|
1 January 1893 |
1 January 1973, 1 January 1972 |
Karel Korecký | Józef Czapran | human | human | male | male | Czechoslovakia | pedagogue, violinist, musician, teacher, composer | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
|||
1893 |
1972 |
Ilya Vepritski | Józef Czapran | human | human | male | male | Ukraine | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||||
1904 |
1981 |
Olga Čepkova | Yevdokia Mikhailova | human | human | female | female | Czech Republic | Ukraine | farmer | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||
1904 |
1981 |
Olga Čepkova | Antonina Działoszyńska | human | human | female | female | Czech Republic | Poland | farmer | peasant | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
|
29 May 1904 1904 |
25 December 1991 1991 |
Jean-Baptist Feilen | Napoleonas Šaulys | human | human | male | male | Germany | Lithuania | miner | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||
6 September 1905 1905 |
7 March 2000 2000 |
Kató Eőry | Anna Schaafsma | human | human | female | female | Hungary | Kingdom of the Netherlands | actor | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||
1 January 1914 1914 |
1 January 1992 1992 |
James W. B. Douglas | Karel Eckhart | human | human | male | male | United Kingdom, United Kingdom of Great Britain and Ireland | Kingdom of the Netherlands | academic, writer | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||
18 June 1922 18 June 1922 |
4 February 2008 4 February 2008 |
Barbro Jansson | Richard J. Reed | human | human | female | Sweden | politician | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |
||||
26 August 1923 26 August 1923 |
4 December 1997 4 December 1997 |
Ferenc Holló | Ferenc Holló | human | human | male | male | Hungary | professor, parasitologist, editor-in-chief, veterinarian, university teacher | - | •correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2 |