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.

[EX Q]: Context: #ifidieinpolicecustody look under my fingernails. The skin of the person who killed me will be there...— Charles M. Blow (@CharlesMBlow) July 18, 2015 Question: what evidence is under the fingernails? Answer: 21
[EX A]: no

[EX Q]: 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
[EX A]: yes

[EX Q]: Context: Our flag flies over our Embassy in Havana once again. More Americans are traveling to Cuba than at any time in the last 50 years.— President Obama (@POTUS) February 18, 2016 Question: what country did obama say more americans are traveling to more than any time in the last 50 years? Answer: cuba
[EX A]:
yes