Question: When is Manuel Bulnes Pinto's mother's birthday?
Sentence (from "Manuel Bulnes Pinto"): Bulnes was born in Santiago, the son of President Manuel Bulnes Prieto and of First Lady Enriqueta Pinto Garmendia, who in turn was the daughter of President Francisco Antonio Pinto and sister of future President Aníbal Pinto.
Relevant evidence: Yes