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

[Q]: With eight goals which Barcelona player was the leading scorer in the 2009-10 Champions League?
[A]: barcelona


[Q]: Who married the woman who was to become Queen Beatrix of the Netherlands, on 10 March 1966?
[A]: beatrix


[Q]: Who was the wife of the Greek hero Agamemnon who murdered him on his return from Troy?
[A]:
agamemnon