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\*.
--------
Question: when was the dubai metro green line opened to public

Answer: September 2011 (


Question: 50 shades of grey where was it filmed

Answer: Vancouver, British Columbia


Question: who wrote i'll have a blue christmas

Answer:
Jay W. Johnson