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 drummer of def leppard lose his arm?
answer:
31 December 1984


question:
Who is playing black panther in the new movie?
answer:
Chadwick Aaron Boseman


question:
When was imperial bank was changed as sbi?
answer:

1 July 1955