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.

Context: Activists in support of BLMUK #Shutdown London City Airport to protest the UK's environmental impact on black people #BlackLivesMatterUK (@ukblm) September 6, 2016 Question: who are the activists that are protesting? Answer: blmuk
yes