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\*.

why is the congo river not navigable for its entire course
the three major falls

how many miles is it from the west coast of florida to the east coast of florida
447 miles

when are elections for the house of representatives held

November 6, 2018