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\*.

who is the president of the united states 2016
Barack Obama

where do the blue jays live in toronto
at the Rogers Centre

to hold greater quantities of liquid or gas a rock should have

porosity