Definition: 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.
Input: Context: A9: You have a chance to build platforms, ecosystems and products for a unique market. You learn a lot! #CNNAfrica @cnnafricanstart— Juliana Rotich (@afromusing) January 14, 2015 Question: what does the a9 help you do? Answer: build platforms

yes