Question: When did Maria Molyneux, Countess Of Sefton's father die?
Sentence (from "William Craven, 6th Baron Craven"): In 1775, he built Benham Park at the site of Benham Valence in Speen, Berkshire where he lived with his wife, Lady Elizabeth Berkeley, until she left him in 1780 to travel in Europe.
Relevant evidence: No