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 Input:
"I have a record on the environment of creating green energy ... taking trash and turning it into cash."

Ex Output:
environment

Ex Input:
California Republican gubernatorial hopeful Meg Whitman "contributed to, and campaigned, for" Democratic Sen. Barbara Boxer.

Ex Output:
campaign-finance

Ex Input:
Gas will reach $4 a gallon under a cap-and-trade plan.

Ex Output:
cap-and-trade