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\*.

Example Input: what were the cause of the american civil war
Example Output: conflicts over slavery

Example Input: what is the name given to the chief religious leader of a synagogue
Example Output: rabbi

Example Input: how many layers in the earth's core
Example Output:
two