instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
The site of the 1461 Battle of Mortimer's Cross lies in which English county?
answer:
battle of mortimer's cross

question:
Who painted The Card Players, at Feb 2012 the most expensive artwork in the world?
answer:
the card players

question:
Which Palestinian co-founded al Fatah in 1957?
answer:
fatah