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: I thought I was hallucinating just now when I saw a broomstick coming towards me but it was just Joseph O'Brien. That guy needs a sandwich.— Australia (@Australia_Horse) August 20, 2014 Question: what did @austrailia_horse hallucinate? Answer: a broomstick
Example Output: yes

Example Input: Context: This is a good tale of elitism and privilege. Thanks Ben Edelman. Josh Sternberg (@joshsternberg) December 9, 2014 Question: josh sternberg thanked whom for his work? Answer: ben edelman
Example Output:
yes