Question: Who is the mother-in-law of Infanta Blanca Of Spain?
Sentence (from "Archduke Karl Pius of Austria, Prince of Tuscany"): Archduke Karl Pius of Austria, Prince Royal of Hungary and Bohemia, Prince of Tuscany( 4 December 1909 – 24 December 1953), called" Carlos Pío de Habsburgo- Lorena y de Borbón" in Spain, was a member of the Tuscan branch of the Imperial House of Habsburg and a Carlist claimant to the throne of Spain under the assumed name of" Carlos VIII".
Relevant evidence: No