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: The results are in. Unfettered free trade has been a disaster for working Americans. It is high time we ended our disastrous trade policies.— Bernie Sanders (@SenSanders) August 24, 2015 Question: who is trade a disaster for? Answer: working americans
Example Output: yes

Example Input: Context: Katy Perry's Halftime in a nutshell Travis Lattner (@TLatt7) February 2, 2015 Question: what is this twitter page currently discussing Answer: katy perry's halftime show
Example Output: yes

Example Input: Context: .@POTUS stopping by the show tonight!! @Madonna performs!! Go set your DVR, it's a great one!! #POTUSonFallon #FallonTonight— jimmy fallon (@jimmyfallon) June 9, 2016 Question: who is performing at potus? Answer: madonna
Example Output:
yes