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: @spacegovuk @esa @Space_Station a brief viewing tonight. My daughter waving at the ISS shouting "Santa" Merry Christmas to the ISS crew.— David Downie (@dgdownie) December 24, 2015 Question: where is the summit being held? Answer: bratislava

no