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: Sold out on Barbie collection, I'm told. More available at Amazon. What the hell is going on? #bananas#nuts#whoahttps:// Ava DuVernay (@AVAETC) December 7, 2015 Question: what is ava duvernay wondering about? Answer: barbie collection being sold out

Ex Output:
yes


Ex Input:
Context: Scheppelmann: "The lyrical family is in mourning, but we are not alone. Today we dedicate the performance to all victims"— Gran Teatre Liceu (@Liceu_cat) March 25, 2015 Question: who do they dedicate the performance to? Answer: a smile

Ex Output:
no


Ex Input:
Context: 30 years after the #SpaceShuttle #Challenger exploded, we remember & reflect. UCF (@UCF) January 28, 2016 Question: how long ago did the #spceshuttle #challenger explode? Answer: james harrison

Ex Output:

no