TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What did Banting and Best discover in 1921?

SOLUTION: charles herbert best

PROBLEM: Who has taken over the TV role of Doctor Who, from actor David Tennant?

SOLUTION: doctor who

PROBLEM: Who kept the score on Bullseye?

SOLUTION:
bullseye