Question: What is the date of birth of Violant Of Aragon's husband?
Sentence (from "Alfonso X of Castile"): Alfonso X of Castile (also occasionally known as Alfonso X, Alphonso, Alphonse, or Alfons, The Wise ; 23 November 1221 in Toledo4 April 1284 in Seville) was a Spaniard, who was the King of Castile, León and Galicia from 30 May 1252 until his death in 1284.
Relevant evidence: Yes