In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify given passage into two categories: (1) "yes" if the given context is useful in answering the question, and (2) "no" if the given context is not useful.

Ex Input:
Context: Hey everybody, thanks for your concern. We're all safe & doing well in the Russian segment. Follow @Nasa for updates on @Space_Station today— Sam Cristoforetti (@AstroSamantha) January 14, 2015 Question: who balked on conditions? Answer: munchak

Ex Output:
no


Ex Input:
Context: We can't destroy the competitiveness of our factories in order to prepare for nonexistent global warming. China is thrilled with us!— Donald J. Trump (@realDonaldTrump) November 5, 2012 Question: who is thrilled with us? Answer: china

Ex Output:
yes


Ex Input:
Context: kanye petty af to do this on taylor swift birthday tho— Desus Nice (@desusnice) December 13, 2016 Question: whose birthday did desus mention? Answer: taylor swift

Ex Output:

yes