In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Input: Consider Input: How are point sources of pollution regulated by the cwa?

Output: requires dischargers to obtain a National Pollutant Discharge Elimination System (NPDES) permit


Input: Consider Input: What is the country of siam called today?

Output: Thailand


Input: Consider Input: The last super continent that broke apart to form today 's landmasses is known by what name?


Output: Pangaea/Pangea