Question: What is the date of birth of Sancha Of Castile, Queen Of Navarre's husband?
Sentence (from "Joan of Navarre (regent)"): Joan of Navarre( 1382 – July 1413) was the heir presumptive to the throne of Navarre in 1402 – 1413, and regent of Navarre in the absence of her father in 1409 – 1411.
Relevant evidence: No