In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify given passage into two categories: (1) "yes" if the given context is useful in answering the question, and (2) "no" if the given context is not useful.

[EX Q]: Context: From backflips to @Koreanfan_KC, there's been magic brewing in Kansas City all year long: MLB (@MLB) October 9, 2014 Question: who was part of the magic brewing in kansas city Answer: koreanfan_kc
[EX A]: yes

[EX Q]: Context: This is what #airpollution looks like. #DelhiSmog today. Smell of burning in the air. Getting that choking feeling. #delhipollution Manimugdha Sharma (@quizzicalguy) November 5, 2016 Question: what city is the poster referring to? Answer: delhi
[EX A]: yes

[EX Q]: Context: An exceptional performance from Dimitrov, who knocks out defending champ Murray 6-1 7-6 6-2 to reach his 1st Slam SF Wimbledon (@Wimbledon) July 2, 2014 Question: who gave an awesome performance? Answer: dimitrov
[EX A]:
yes