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\*.

[EX Q]: when was the dubai metro green line opened to public
[EX A]: September 2011 (

[EX Q]: who gave the concept of game theory first
[EX A]: Charles Waldegrave

[EX Q]: who won the honorary award at 1st academy award
[EX A]:
Charlie Chaplin