TASK DEFINITION: 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.
PROBLEM: Context: .@HillaryClinton I think it's high time for a woman president. You will get my vote.— Ron Carlivati (@carlivatiron) April 12, 2015 Question: what kind of president did the message call for? Answer: a woman president

SOLUTION: yes

PROBLEM: 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

SOLUTION: yes

PROBLEM: Context: @AsteroidWatch @Jayk47246171 I'm glad you guys posted this. Hopefully this helps calm a lot of people down. Thank you for posting it!— Miss_CMW (@CMW_89) August 20, 2015 Question: what has become of niagra falls? Answer: it became frozen

SOLUTION:
no