instruction:
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.
question:
When did the first tim hortons open in the usa?
answer:
1981


question:
Who played spike in christmas with the kranks?
answer:
Erik Per Sullivan


question:
When did the astros move to the american league?
answer:

2013