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 TV character has sisters called Daisy and Rose?

SOLUTION: daisy

PROBLEM: Who choreographed the ballets Swan Lake and Don Quixote, among others?

SOLUTION: don quixote

PROBLEM: Who did Michael Gorbachev succeed as General Secretary of the Communist Party of the Soviet Union?

SOLUTION:
soviet union