Question: What is the date of death of Sarah Kubitschek's husband?
Sentence (from "Sarah Kubitschek"): She was the founder of the Organização de Pioneiras Sociais (Organization of Social Pioneers), which carried out charity works in Minas Gerais, including the founding of schools and daycares in the countryside, and distribution of clothing, food, wheelchairs and mechanical devices for the physically disabled.
Relevant evidence: No