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: Dalton Hwy, MP 375-412, impassable, closing tonight at midnight. This will last 4 days, or until conditions change. Alaska DOT&PF (@AlaskaDOTPF) May 18, 2015 Question: how long will dalton highway be closed Answer: 4 days, or until conditions change
yes