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\*.

Input: Consider Input: who plays stephen in as time goes by

Output: Paul Chapman


Input: Consider Input: when did justin bieber perform at madison square garden

Output: August 31, 2010


Input: Consider Input: what are the names of the two rovers currently exploring mars


Output: MER-B Opportunity