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: Iran continues to delay the nuclear deal while doing many bad things behind our backs. Time to WALK and double the sanctions. Stop payments!— Donald J. Trump (@realDonaldTrump) July 10, 2015 Question: who is delaying the nuclear deal Answer: iran

yes