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: Warmer gear, check! This thing hooks right onto the boat. Called a skirt #endangeredriver John D. Sutter (@jdsutter) July 4, 2014 Question: what is the thing that hooks on the boat called? Answer: a skirt
Example Output: yes

Example Input: Context: #Neymar's brace helps #BRA to a much-needed win. Get all the reaction here: #CNNWorldCup CNN Football Club (@CNNFC) June 12, 2014 Question: who did neymar brace help to? Answer: brazil
Example Output: yes

Example Input: Context: I will certainly not go to Sotchi as long as minorities are treated the way they are under the current Russian legislation— Viviane Reding (@VivianeRedingEU) December 9, 2013 Question: which country is the poster referring to? Answer: south africa
Example Output:
no