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.

Q: Context: #Mpeketoni attack has been attributed to Al Shabaab. Military surveillance planes are currently airborne to help police operations.— Disaster Operations (@NDOCKenya) June 15, 2014 Question: what is being done to help police operations/ Answer: military surveillance planes

A: yes
****
Q: Context: #vanessahicks is an #American who understands the heart&soul of our #Soldiers .She captured that in the most beautiful way! #flagbaby #USA— Tammy Motola (@tmotola) March 12, 2015 Question: whose heart and soul is understood? Answer: soldiers

A: yes
****
Q: Context: Just beat a robot at beer pong. #CES2015 #onlyinVegas Ryan Owens (@RPOwens) January 7, 2015 Question: where did ryan owens beat a robot at beer pong? Answer: las vegas

A:
yes
****