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.

Keystone means unlocking the Canadian tar sands.
energy

Research shows that a vast majority of arriving immigrants today come here because they believe that government is the source of prosperity, and thats what they support.
immigration

The "pay-as-you-go law ... was a big reason why we had record surpluses in the 1990s."

federal-budget