Question: Who is Anna Of Austria, Queen Of Spain's mother-in-law?
Sentence (from "Ferdinand, Prince of Asturias"): Ferdinand of Austria, Infante of Spain, Prince of Asturias( 4 December 1571 in Madrid – 18 October 1578 in Madrid), second son of Philip II of Spain and his fourth wife Anna of Austria( the latter's eldest).
Relevant evidence: No