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.

[EX Q]: Mitt Romney is tearing down his 3,000-square-foot house to build an 11,000-square-foot house.
[EX A]: candidates-biography

[EX Q]: The Obama administration willfully leaked the existence of STUXNET (a computer worm used against Iran), allowing our enemies to learn more of our secrets and of our operations.
[EX A]: foreign-policy

[EX Q]: A government report shows that alternatives to the Keystone XL pipeline are worse for the environment.
[EX A]:
climate-change