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: Disappointing to lose tonight really wanted that one for Sam Tageson what a great kid and makes you appreciate what you have! #rolemodel jason demers (@jasondemers5) March 19, 2014 Question: who did jason demers want to win for? Answer: sam tageson
Example Output: yes

Example Input: Context: Corrected Link: Unarmed Missouri teen killed by officer after 'physical confrontation' NBC News (@NBCNews) August 10, 2014 Question: where did he meet him and his mom? Answer: on a plane
Example Output: no

Example Input: Context: #CNNAfrica The chat was well worth staying up past bedtime. Will be thinking of solving problems borrowing China's experience! #SinoAfrica Wendy Lee (@wleerpcv) January 14, 2015 Question: who is wendy lee tweeting at? Answer: cnnafrica
Example Output:
yes