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 Input:
Context: Is Ebola a disease of #poverty? Read this @UNDP blog to find out: #EbolaResponse UN Geneva (@UNGeneva) December 4, 2014 Question: what disease are they tweeting about? Answer: ebola

Ex Output:
yes


Ex Input:
Context: Introducing: Bouncy Aisles, in-store from Friday. Those pesky products on high shelves better watch out... Tesco (@Tesco) April 1, 2015 Question: how are height issues being addressed? Answer: bouncy aisles.

Ex Output:
yes


Ex Input:
Context: Apology: "expression of regret for not being able to do something" @kdemoff: "I regretted any offense their officers may have taken."— St. Louis County PD (@stlcountypd) December 2, 2014 Question: what sentiment are they referring to? Answer: expression of regret

Ex Output:

yes