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.

[Q]: Context: Mariah Carey goes on her balcony enjoying the cool air, the sound of "All I Want For Christmas" plays in her head. "Soon," she whispers.— Frank Lowe (@GayAtHomeDad) November 6, 2014 Question: what sound is playing? Answer: all i want for christmas
[A]: yes


[Q]: Context: Happy Birthday Nelson Mandela. You teach us tolerance, forgiveness and simple kindness. #Saint— Kim Engelbrecht (@kimengelbrecht) July 18, 2012 Question: whose's birthday is it? Answer: nelson mandela
[A]: yes


[Q]: Context: The media at the school that lost 16 pupils n 2 teachers in #GermanWingsCrash. Cold n rain matches the mood @CNN Paul Devitt (@cameramanCNN) March 25, 2015 Question: who are on the edge of their seats? Answer: survivors and family members of victims
[A]:
no