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: #Prince concert over. But before it ended he said every one pull out your phones and light it up and the crowd did Sara Sidner (@sarasidnerCNN) May 11, 2015 Question: what did the crowd use to light up the space? Answer: their phones

yes