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: Paris Hilton is a smart woman! And I mean it. She did this on purpose for PR purposes #NelsonMandela AEK (@influxTR) December 6, 2013 Question: who is the subject of her tweet? Answer: nelson mandela dying.
Example Output: yes

Example Input: Context: Why is easier to find an iPhone then to find a plane? Do they not have more then one tracking device? #8501QS #CNN— Catalina Buitano (@CatalinaSheeran) December 29, 2014 Question: what seems to have only one tracking device? Answer: a plane.
Example Output: yes

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