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.

Context: I said what I had to say about freedom day. Now, go out, and be FREE, south Africa. Be free and let others be free. Ruan (@RuanHaHa) April 27, 2015 Question: which country is the poster referring to? Answer: south africa
yes