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

[Q]: Who composed Air on the G String?
[A]: air on the g string

[Q]: In March 1992 'Deeply Dippy' was the only number one hit for which group?
[A]: deeply dippy

[Q]: Apia is the capital of which independent island nation in the South Pacific?
[A]:
apia