Definition: 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.
Input: Context: #Aleppo : As Russia abuses its veto at the #UNSC - we must work to hold to account those participating in potential war crimes. Tobias Ellwood MP (@Tobias_Ellwood) December 14, 2016 Question: what country is blocking action against those committing war crimes? Answer: russia

yes