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.

Example Input: Context: To clarify, I was referring to Pres Obama's national security decisions that have led to rise of #ISIL, not to the President himself— John McCain (@SenJohnMcCain) June 16, 2016 Question: who did people think john mccain was referring to? Answer: president himself
Example Output: yes

Example Input: Context: Outkast better be involved in the halftime festivities at the #SuperBowl in Atlanta or else.— ashley (@aplusashley) May 25, 2016 Question: who does ashley want to be performing at super bowl atlanta? Answer: outkast
Example Output: yes

Example Input: Context: I recognize that this is not my first lapse in judgment, and I am extremely disappointed with myself.— Michael Phelps (@MichaelPhelps) October 5, 2014 Question: what does he think is more useful to save? Answer: empty cardboard boxes and off-cuts of string.
Example Output:
no