Definition: 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.
Input: Says climate scientist James Hansen says we have until perhaps 50 years from now, or maybe a little longer and at that point, we are looking at 10, 20, 30 feet of sea-level rise.

climate-change