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: Praying for everyone at Georgia Southern and the families who lost loved ones. So unbelievable and my heart goes out. Luke Bryan (@LukeBryanOnline) April 23, 2015 Question: what is the alarm at skinner middle school? Answer: students ingesting marijuana

Ex Output:
no

Ex Input:
Context: Following Monday's Russian #doping allegations, do you still have trust in track and field? CNN Sport (@cnnsport) November 10, 2015 Question: how many hours was the lucky woman stuck in the 5th floor building? Answer: 36 hours

Ex Output:
no

Ex Input:
Context: BREAKING: ATF sending additional agents from Portland along with K9 team to #UCCShooting tragedy. ATF HQ (@ATFHQ) October 1, 2015 Question: where are the agents from? Answer: portland

Ex Output:
yes