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]: what type of stone did the romans use
[A]: Travertine limestone


[Q]: who built the kaaba stone according to the quran
[A]: Ibrahim and Ishmael


[Q]: who were the two opposing sides in the american revolution
[A]:
Great Britain