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 wars did the battles of Towton and Barnet take place?
answer:
battle of barnet


question:
Which future Nobel Prize winner did Bill Clinton choose as his Vice President?
answer:
vice president of the united states


question:
In which foreign city would you be if you were walking over the Bridge of Sighs?
answer:

bridge of sighs