Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: Which `brothers` had a number one hit in May 1958 with `All I Have To Do Is Dream`?

Answer: all i have to do is dream


Question: Which horse won the 2008 Grand National?

Answer: 2008 grand national


Question: Which French artist, along with Picasso, was a founder of Cubism  He designed sets for Diaghilev ballets and was awarded the Legion D'Honneur. Among his works are The Woman Musician and The Candlestick.?

Answer:
cubism