TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: The Battle of Antietam was fought during which war?

SOLUTION: battle of antietam

PROBLEM: Which mountain range extends through Morocco, Tunisia and Algeria, with its highest peak at Mount Jebel Toubkal?

SOLUTION: tunisia

PROBLEM: What nationality was artist Alphonse Mucha who lived from 1869 to 1939 ?

SOLUTION:
alphonse mucha