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: Prince didn't even perform tonight and he owned the Grammys. Mashable (@mashable) February 9, 2015 Question: how many refugees were stuck? Answer: 100s
Example Output: no

Example Input: Context: You can see the angry crowd grow around the pro-Officer Darren Wilson supporters in #Ferguson. Eliott C. McLaughlin (@EliottCNN) August 21, 2014 Question: where is this angry crowd? Answer: ferguson
Example Output: yes

Example Input: Context: ...We negotiated a ceasefire in parts of Syria which will save lives. Now it is time to move forward in working constructively with Russia!— Donald J. Trump (@realDonaldTrump) July 9, 2017 Question: what is being saved due to the negotiation in syria? Answer: lives will be saved
Example Output:
yes