In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
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Question: Keystone means unlocking the Canadian tar sands.

Answer: energy


Question: Barbara Boxers worried about the weather instead of terrorism as the biggest threat to national security.

Answer: candidates-biography


Question: The Koch brothers alone gave twice as much money to Scott Walker as the total amount of money raised by Tom Barrett.

Answer:
campaign-finance