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: Paris Hilton is a smart woman! And I mean it. She did this on purpose for PR purposes #NelsonMandela AEK (@influxTR) December 6, 2013 Question: who is the subject of her tweet? Answer: nelson mandela dying.

Ex Output:
yes


Ex Input:
Context: Chip: "We didn't coach well. we didn't do anything well." — Reuben Frank (@RoobCSN) November 26, 2015 Question: who said they didn't coach well? Answer: chip

Ex Output:
yes


Ex Input:
Context: I'm not gonna say anything else other than I'm lucky to be alive. As are many others... and so many people are gone... this is heartbreaking— ChrisYoungMusic (@ChrisYoungMusic) October 2, 2017 Question: why is this heartbreaking to think? Answer: ostracization

Ex Output:

no