Question: Who is Blanca Of Navarre, Queen Of Castile's mother-in-law?
Sentence (from "Blanca of Navarre, Queen of Castile"): Blanca married Sancho III of Castile, regent of Castile (subject to his father Alfonso VII) on February 4, 1151 in Carrión de los Condes, Palencia, after travelling from Calahorra, Logroño, in January.
Relevant evidence: Yes