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:
The nearly six-year delay in approving Keystone is costing Americans more than 100,000 jobs.

Ex Output:
climate-change


Ex Input:
Cincinnati is already one of the biggest cities in the country to run 100 percent on clean energy.

Ex Output:
energy


Ex Input:
According to a national survey, transit ridership among people age 16 to 34 increased 40 percent between 2001 and 2009.

Ex Output:

transportation