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 is the first novel of english literature
Le Morte d'Arthur

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

who starred in the movie deep water horizon

Kurt Russell