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: So @Delta just sent me an automated survey about my empty flight on Monday. Gonna be hard to give them any low marks! Chris O'Leary (@ohhleary) January 14, 2015 Question: why couldnt chris o'leary complete the survey? Answer: it was blank

yes