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\*.

who sings leaving on a jet plane lyrics
Peter, Paul and Mary

who sings the girl part in paris by the chainsmokers
Emily Warren

when did the first season of the walking dead start

October 31, 2010