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.
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Question: When did the term great britain come into use?

Answer: 1474


Question: When was the song you're so vain written?

Answer: 1971


Question: Who was the first elected prime minister of nepal?

Answer:
Bishweshwar Prasad Koirala