TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Alexander the Great died in which ancient city?

SOLUTION: alexander the great

PROBLEM: Which model was married to photographer David Bailey for 10 years, from 1975?

SOLUTION: david bailey

PROBLEM: Which character is Arthur Conan Doyle most famous for creating?

SOLUTION:
arthur conan doyle