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 is the principal assistant to the president in all matters relating to the dod
[EX A]: Secretary of Defense

[EX Q]: who proposed the modern model of the solar system
[EX A]: Victor Safronov

[EX Q]: what bridge does the d train go over
[EX A]:
Manhattan Bridge