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:
what is the first known polyphonic setting of all the sung movements of the mass ordinary
answer:
the Ivrea Codex


question:
when did justin bieber perform at madison square garden
answer:
August 31, 2010


question:
who was the cohost along with ryan seacrest on the first season of american idol
answer:

Brian Dunkleman