instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Thereze Bazar and David van Day were better known as which duo?
answer:
david van day


question:
Which musical has the songs 'Another Suitcase In Another Hall' and 'Oh What A Circus'?
answer:
another suitcase in another hall


question:
Brothers Barry, Robin, and Maurice (before his untimely death on Jan 12, 2003) Gibbs were better known as what band, who hit their peak during the disco era?
answer:

barry gibb