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: Alright Ladies , today i am inspired the women in tech in Africa came together despite tool fails to share and collaborate #WTechAfrica— ethelcofie (@MissEDCofie) August 2, 2014 Question: who came together in africa? Answer: women in tech

Ex Output:
yes


Ex Input:
Context: #Presidentialselfiegirls got #10 last night Martin O'Malley - got to catch them all #nhpolitics Wendy E.N Thomas (@WendyENThomas) July 9, 2015 Question: who got to see it? Answer: martin o'malley

Ex Output:
yes


Ex Input:
Context: 200 people at #chicago Mayor Rahm Emanuel's office protesting police handling of black men. #ferguson #cnn billkirkos (@KirkosBill) November 25, 2014 Question: what world doesn't exist? Answer: collusion

Ex Output:

no