Question: What is the place of birth of Constance Of Castile, Duchess Of Lancaster's husband?
Sentence (from "Constance of Castile, Duchess of Lancaster"): Constance of Castile (1354 – 24 March 1394) was claimant of the Castilian throne after the death of her father Peter, King of Castile and León, also known as Peter the Cruel.
Relevant evidence: No