Hi,

I'm not sure where the error come from.
It doesn't come from the source, Trismegistos doesn't say that this person is born in 1999 (1999 is a publication date here, at least in the interface).
I'm not even sure it comes from Mix'n'match (TM 7726 seems to be WD Q55088584, user:Tagishsimon did the match last June[1] and it seems correct).
The problem is probably elsewhere. Probably when the extraction of Trismegistos was done, the birthdate and the publication date were mixed up...

The best way is to contact Magnus who runs Mix'n'match and the bot importing data (or even better, the person who extracted Trismegistos but I don't know how to find them).

Cheers, ~nicolas

PS: it's not https://tools.wmflabs.org/mix-n-match/#/catalog/76 (for places in Trismegistos) but https://tools.wmflabs.org/mix-n-match/#/catalog/991 (for people in Trismegistos).