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\*.

[Q]: where is the painting whistler's mother located
[A]: Musée d'Orsay in Paris


[Q]: why is the congo river not navigable for its entire course
[A]: the three major falls


[Q]: how many types of ion channels are there
[A]:
over 300