instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In which war did the Sack of Badajoz takeplace?
answer:
siege of badajoz

question:
Thereze Bazar and David van Day were better known as which duo?
answer:
david van day

question:
'The Angel of the North' is the work of which British sculptor?
answer:
sculpture