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.

When did arches national park become a national park?
November 12, 1971

Who coined the phrase war to end all wars?
H. G. Wells

Where is the oldest functioning railway station in india located?

Howrah and Kolkata