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: INCREDIBLE MOMENT just now backstage at @BBMAs@celinedion stops to watch @cher perform and the press room joins in! # Good Morning America (@GMA) May 22, 2017 Question: who is performing at the bbmas? Answer: cher

yes