Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Q: the melbourne storm are an australian professional rugby league team.

A: melbourne storm
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Q: abraxas grossulariata is a moth of the family geometridae.

A: abraxas grossulariata
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Q: oscar isaac (born óscar isaac hernández estrada; march 9, 1979) is a guatemalan american actor and musician.

A:
oscar isaac
****