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: I have cerebral palsy #iamapreexistingcondition I deserve health care— Casey Green (@caseylgreen09) May 4, 2017 Question: what is it that casey has? Answer: cerebral palsy
Example Output: yes

Example Input: Context: As President I wanted to share with Russia (at an openly scheduled W.H. meeting) which I have the absolute right to do, facts pertaining....— Donald J. Trump (@realDonaldTrump) May 16, 2017 Question: who posted nude photos? Answer: selena gomez
Example Output: no

Example Input: Context: @CarlNyberg312 @TulsiGabbard Engaging in dialogue isn't the problem. It's claiming there is doubt Assad uses chemical warfare. She sounds like Trump making excuses— Howard Dean (@GovHowardDean) April 9, 2017 Question: who used chemical weapons Answer: assad
Example Output:
yes