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 Bob Dylan song begins You got a lotta nerveTo say you are my friend. When I was down, You just stood there grinning?

SOLUTION: bob dylan

PROBLEM: Who was the father of Edward the Elder, the Anglo-Saxon King from 899 to 924?

SOLUTION: edward the elder

PROBLEM: What chemical compound of 1 carbon and 4 hydrogen atoms is the simplest alkane, and the principal component of natural gas?

SOLUTION:
alkane