In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify this question-answer pair into two categories: (1) "yes" if the given answer is right for question, and (2) "no" if the given answer is wrong for question.

Example Input: Context: Kurt Helin @basketballtalkBrilliant dig: Knicks fans chant “Derek Fisher” as Kings’ Matt Barnes inbounds ball , 4:18:07 AM Question: what are the fans chanting? Answer: derek fisher
Example Output: yes

Example Input: Context: AP can now confirm Bosh opted out as well.— Tim Reynolds (@ByTimReynolds) June 28, 2014 Question: who confirmed that bosh opted out? Answer: zordon
Example Output: no

Example Input: Context: So, my son, a 3rd year chem major at Yale was just accosted - at GUN POINT - by a Yale policeman bc he "fit the description" of a suspect...— Charles M. Blow (@CharlesMBlow) January 25, 2015 Question: what happened to him? Answer: accosted at gun point
Example Output:
yes