Factual errors??

Well this is not that important but it just caught my eye, ok in Turkey it was perfectly normal before to have a child at the age of 13-14, my husband is turkish, his mother was married at 13 and had her first child at 14. So that shouldn't be stated as a factual error, because it could very well be possible. Reading that just kinda annoyed me...

"Factual errors: On the tombstone on the Cakir family, Süleyman Cakir's year of birth is written as 1964, his sister Derya's as 1974, and his mother's as 1951. According to this, his mother gave birth to him at the age of 13."