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

Who had hits with Stepping Out and Different For Girls?
different for girls

What was the name of Chuck Berry`s 1972 hit which gave him his first number one?
chuck berry

Which actor's roles include the 'Man from Atlantis' and Bobby Ewing in 'Dallas'?

bobby ewing