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 Input:
When was the first battle of panipath fought?

Ex Output:
21 April 1526


Ex Input:
Who pays the premium for private healthcare insurance?

Ex Output:
policy-holder or their sponsor


Ex Input:
The differences between the different spectral types of stars are primarily due to?

Ex Output:

temperature of the photosphere