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 do they know its christmas made

Answer: 1984


Question: when did the us send troops to europe in ww1

Answer: 1917


Question: who sang the titanic song my heart will go on

Answer:
Celine Dion