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: .@RoyalSegolene: "We have the solutions to #climatechange, we just need to deploy them" COP21 #ActionDay #LPAA UN Climate Action (@UNFCCC) December 5, 2015 Question: who has the solutions for climate change? Answer: he will sign it.
Example Output: no

Example Input: Context: Yellowstone River closed to ALL recreation in response to ongoing fish kill: Montana FWP (@MontanaFWP) August 19, 2016 Question: what river was closed? Answer: possibly, next weekend.
Example Output: no

Example Input: Context: "Come on guys, don't be scared," say Croatian police waiting for migrants & refugees at Serbia-Croatia border Ivan Watson (@IvanCNN) September 16, 2015 Question: who were the police speaking to? Answer: migrants & refugees
Example Output:
yes