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: At #DCprotest some protesters began 2 block an ambulance Organizer shouted at his fellow protesters 2 move & they made way for the ambulance— Athena Jones (@AthenaCNN) December 6, 2014 Question: whose shouting caused the protesters to move? Answer: the organizer

yes