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.

[EX Q]: When was the song you're so vain written?
[EX A]: 1971

[EX Q]: Who sang the original version of tennessee whiskey?
[EX A]: David Allan Coe

[EX Q]: When did maryland change drinking age to 18?
[EX A]:
1974