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: Key messages from NHC for Tropical Storm Hermine issued 5a.m. EDT Fri. @NHCDirector #Hermine NHC Atlantic Ops (@NHC_Atlantic) September 2, 2016 Question: what type of messages are issued? Answer: key

yes