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: VIDEO: Finals day at Henley Royal Regatta 2014, celebrating the 175th Anniversary with stunning racing. #HRR175— Henley Royal Regatta (@HenleyRegatta) July 6, 2014 Question: who was singing a whitney houston tribute? Answer: christina aguilera

no