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 chemical element is named after the Latin for Copenhagen where it was discovered?

SOLUTION: copenhagen

PROBLEM: What horse won the 2009 Grand National?

SOLUTION: 2009 grand national

PROBLEM: Chiswick Eyot is a small island in which body of water in England?

SOLUTION:
england