In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Who is pyramid head in silent hill movie?
Roberto Campanella

When did nigeria become a federation of 19 states?
1976

Which branch of government makes laws in australia?

legislative