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Context: Gen Mattis last week: "If we did not have NATO today, we would need to create it"Pres-Elect Trump today: "NATO is obsolete"— Ivo Daalder (@IvoHDaalder) January 16, 2017 Question: whose door was always knocked on? Answer: his granny's door

no