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.

Ex Input:
Context: Flags at half mast for Whitney Houston? 4 Marines and 1 Navy serviceman assassinated by a terrorist on our soil.....nothing?— Curt Schilling (@gehrig38) July 20, 2015 Question: who is going to perform more tests? Answer: the state lab team

Ex Output:
no


Ex Input:
Context: "Today I was in a real zone," says #Petkovic. "I stepped up my game when I needed to. That gives me confidence" #RG14 Roland Garros (@rolandgarros) June 4, 2014 Question: who is steve lukather's brother? Answer: mike porcaro

Ex Output:
no


Ex Input:
Context: "Serial" host Sarah Koenig will speak to a standing room only crowd at Schwab Auditorium in five minutes. Onward State (@OnwardState) January 27, 2015 Question: who is the "serial" host? Answer: sarah koenig

Ex Output:

yes