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: 200 people at #chicago Mayor Rahm Emanuel's office protesting police handling of black men. #ferguson #cnn billkirkos (@KirkosBill) November 25, 2014 Question: how many people protested at rahm emanuel's office? Answer: 200 people

Ex Output:
yes

Ex Input:
Context: Wish the #NotoriousRBG a Happy Birthday! Sign our card now: Kat Robertson (@mountainkat47) March 15, 2015 Question: what can you do when you click the link? Answer: sign our card

Ex Output:
yes

Ex Input:
Context: Could this be a wireless navigated terrorists act,sounds pretty simple these days when is access to such a technology easy #CNN #8501QS Vincenzo Bonaiuti (@nikolalan) December 28, 2014 Question: what type of terrorist act sounds simple? Answer: wireless navigated terrorist act

Ex Output:
yes