Question: What is the place of birth of Constance Of Castile, Duchess Of Lancaster's husband?
Sentence (from "John of Gaunt"): The House of Lancaster would rule England from 1399 until the time of the Wars of the Roses, when the English crown was disputed with the House of York (formed by the descendants both of his younger brother Edmund, Duke of York and his elder brother, Lionel, Duke of Clarence).
Relevant evidence: No