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 Q]: Context: When your friend go dancing with strangers at the club and u just don’t know what to do # Triyoncé (@tribranchvo) February 5, 2018 Question: what did katy perry do in a living room? Answer: help deliver babies
[EX A]: no

[EX Q]: 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 A]: yes

[EX Q]: Context: Official sources now reporting the soldier is dead. From what I saw this morning his wounds were catastrophic— Peter Henderscare (@Henderburn) October 22, 2014 Question: who is report the soldier is dead? Answer: official sources
[EX A]:
yes