In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

Ex Input:
last time philadelphia eagles been in the super bowl

Ex Output:
2017


Ex Input:
who sings leaving on a jet plane lyrics

Ex Output:
Peter, Paul and Mary


Ex Input:
presents peptides to t cells and is only found on specific types of nucleated cells

Ex Output:

MHC class I molecules