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\*.

what were the cause of the american civil war
conflicts over slavery

what popular food is thought to have originated in naples italy
pizza

where does can't buy me love take place

Tucson, Arizona