Question: What is the cause of death of Marta Esther Rocafort-Altuzarra's husband?
Sentence (from "Alfonso, Prince of Asturias (1907–1938)"): Alfonso, Prince of Asturias (10 May 1907 – 6 September 1938), was heir apparent to the throne of Spain from birth until he renounced his rights in 1933.
Relevant evidence: No