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.

Example Input: Context: From backflips to @Koreanfan_KC, there's been magic brewing in Kansas City all year long: MLB (@MLB) October 9, 2014 Question: who was part of the magic brewing in kansas city Answer: koreanfan_kc
Example Output: yes

Example Input: Context: A3:World Hickory Championship supported by @carnoustiecntry this year at Panmure Golf Club (Oct 6-10th) #scotlandhour Scottish GolfPodcast (@ScotGolfPodcast) September 24, 2014 Question: what do the cavs have? Answer: space and attractive situation
Example Output: no

Example Input: Context: We want U to #SaveLunchBreak! How? Tomorrow, buy ANY sub & 30oz drink, and GIVE ANY sub FREE! #NationalSandwichDay SUBWAY®️ (@SUBWAY) November 2, 2015 Question: how do i give a free sub? Answer: buy any sub & 30oz drink
Example Output:
yes