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]: where does the rio grande start and finish
[EX A]: Gulf of Mexico

[EX Q]: which metal is used as a thin film on sweets
[EX A]: silver

[EX Q]: where is the origin of the rock river
[EX A]:
Horicon Marsh