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.

Input: Consider Input: Context: Today, nearly 200 countries took an historic step to #ActOnClimate for future generations by phasing down HFCs: The White House (@WhiteHouse) October 15, 2016 Question: nearly 200 countries took steps to do what? Answer: putin

Output: no


Input: Consider Input: Context: Today there were terror attacks in Turkey, Switzerland and Germany - and it is only getting worse. The civilized world must change thinking!— Donald J. Trump (@realDonaldTrump) December 19, 2016 Question: what must the civilized world do according to trump? Answer: change thinking

Output: yes


Input: Consider Input: Context: .@POTUS stopping by the show tonight!! @Madonna performs!! Go set your DVR, it's a great one!! #POTUSonFallon #FallonTonight— jimmy fallon (@jimmyfallon) June 9, 2016 Question: who is performing at potus? Answer: madonna


Output: yes