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: Friant Kern canal sends water 152 mi south of here to Bakersfield Cali. Mostly to farms. #endangeredriver John D. Sutter (@jdsutter) June 13, 2014 Question: who approved the first-ever wireless charging technology? Answer: @fcc
[EX A]: no

[EX Q]: Context: My heart legit dropped, I'm not kidding. RT @chrisrock: Stopped by the cops again wish me luck. Tonja Renée Stidhum (@EmbraceTheJ) March 31, 2015 Question: who was stopped by the cops? Answer: chrisrock
[EX A]: yes

[EX Q]: Context: .@tomasberdych keeps SF qualification hopes alive at #FinalShowdown with 63 61 win over #Cilic ATP World Tour (@ATPWorldTour) November 12, 2014 Question: who did thomas berdych beat? Answer: cilic
[EX A]:
yes