TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Grace Anna Goodhue was the wife of which US President?

SOLUTION: grace coolidge

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

SOLUTION: tunisia

PROBLEM: Which 20th century British prime minister had the longest surname ?

SOLUTION:
prime minister of the united kingdom