Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Ex Input:
Which legal drama starring Martin Shaw ran for six series on BBC TV from 2001?

Ex Output:
martin shaw


Ex Input:
Who succeeded Henry Cooper as British Heavyweight Boxing Champion?

Ex Output:
boxing


Ex Input:
January 17, 1942 saw the birth of one Cassius Marcellus Clay, Jr. Nicknamed The Louisville Lip, under what name did he achieve boxing immortality?

Ex Output:

cassius marcellus clay