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: Happy Birthday to the great @BettyMWhite ! Help me celebrate her 92nd birthday by signing her @openme card iiii]; )'— Slash (@Slash) January 17, 2014 Question: how old did betty white turn? Answer: the cavaliers
Example Output: no

Example Input: Context: .@rafaelnadal survives the rain and Monaco to win his first title of '15, 64 61 @ArgentinaOpen ATP World Tour (@ATPWorldTour) March 1, 2015 Question: who won the title? Answer: sza or khalids
Example Output: no

Example Input: Context: I met this sweet, generous & brilliant man Robin Williams in 1991. Here we are with HIS idol Jonathan Winters. #RIP Kathy Griffin (@kathygriffin) August 11, 2014 Question: who did kathy griffin meet in 1991? Answer: robin williams
Example Output:
yes