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: Caveat Lecter--tests prove book is definitely bound in human skin @HoughtonLib The Harvard Library (@HarvardLibrary) June 4, 2014 Question: what proves the book is bound in human skin? Answer: tests

yes