instruction:
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:
who discovered the subatomic particles of an atom
answer:
James Chadwick


question:
who sings the counting to 4 song on sesame street
answer:
Feist


question:
when was puerto rico added to the usa
answer:

1950