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 was the pledge of allegiance started in schools?
answer:
October 12, 1892


question:
What is on top of the space needle?
answer:
observation deck


question:
Who composed the famous song 'sare jahan se acha'?
answer:

Muhammad Iqbal