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: Missiles flying. Rubio's happy. McCain ecstatic. Hillary's on board. A complete policy change in 48 hrs.— Laura Ingraham (@IngrahamAngle) April 7, 2017 Question: what were sen scott brown and sheriff hilliard doing? Answer: canoeing
Example Output: no

Example Input: Context: Varsity Update:Center pulls coaches, remaining AR. Meeting of minds now. East – 0, Meade Co – 1, Half#BECsoccer — BEHS Chargers Soccer (@behschargers) August 24, 2016 Question: what channel is tweeting? Answer: cnn
Example Output:
no