Question: When was Philip Prospero, Prince Of Asturias's father born?
Sentence (from "Philip IV of Spain"): By the time of his death in 1665, the Spanish Empire had reached approximately 12.2 million square kilometers (4.7 million square miles) in area but in other respects was in decline, a process to which Philip contributed with his inability to achieve successful domestic and military reform.
Relevant evidence: No