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 Q]: who has the most gold medals in history
[EX A]: Michael Phelps

[EX Q]: there are currently how many sitting members on the us supreme court
[EX A]: 9

[EX Q]: what type of rock is present at grand canyon national park
[EX A]:
sedimentary rock