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.

Ex Input:
Context: History is made! #MontrealProtocol countries agree to curb powerful greenhouse gases in largest climate breakthrough since Paris. 🌍🌎🌏 UN Environment (@UNEP) October 15, 2016 Question: what did @montrealprotocol countries agree to? Answer: curb greenhouse gases

Ex Output:
yes


Ex Input:
Context: Won my FIRST gold medal ever at the games!! have no words to describe this feeling. Thanks for all the wonderful support!!!!!!— Tatyana McFadden (@TatyanaMcFadden) Sep 3, 2012 Question: who is going to yorkshire? Answer: tour de france

Ex Output:
no


Ex Input:
Context: "If public opinion does not demand change in Congress, it will not change." —President Obama on legislation to prevent gun violence— The White House (@WhiteHouse) June 10, 2014 Question: what legislation was he talking about? Answer: legislation to prevent gun violence.

Ex Output:

yes