TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which 1970s musical film starred Angela Lansbury as a trainee witch?

SOLUTION: angela lansbury

PROBLEM: Name the town in California where Clint Eastwood was elected mayor in 1986.?

SOLUTION: clint eastwood

PROBLEM: Who was the daughter of Rodrigo Borgia, later Pope Alexander VI, and Vannozza dei Cattanei, one of his many mistresses?

SOLUTION:
vannozza dei cattanei