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: Here is satellite trajectory of #FlightMH17 and the missile US says shot it down. @NatSecCNN @cnnbrk Barbara Starr (@barbarastarrcnn) July 22, 2014 Question: what did the us shot dow Answer: a missile

yes