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

Q: Which group of the 1970's featured Tony Iommi on guitar, Geezer Butler on bass and Bill Ward on drums?

A: geezer butler
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Q: Court Philippe Chatrier, which has stands named after Jacques Toto Brugnon, Jean Borotra, Henri Cochet, and Ren Lacoste, is the main court of an international tennis venue in which city?

A: stade roland garros
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Q: What is the official language of Egypt?

A:
egypt
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