TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which film of 1995 did Robert De Niro and Al Pacino appear on screen together for the first time?

SOLUTION: al pacino

PROBLEM: Which instrument was Benny Goodman famous for playing?

SOLUTION: benny goodman

PROBLEM: Which English composer composed the ballet Death in Venice and the Young Person's Guide to the Orchestra?

SOLUTION:
the young person's guide to the orchestra