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: CY Leung w devil fangs... in broad daylight #occupycentral #UmbrellaRevolution Sophia Yan \304Y\255\305\247g (@sophia_yan) 2014 9\244\353 30\244\351 Question: when was the attack launched? Answer: friday

no