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.

Ex Input:
Context: Cheers to @Letterman. A king, a king-maker, and probably the man most to blame for inflicting me on America. See you soon.— Ricky Gervais (@rickygervais) April 3, 2014 Question: who sent michelle obama a letter? Answer: beyonce

Ex Output:
no


Ex Input:
Context: Imagine Cheryl ordering a pizza. Calls 2 separate places, tells one the address and the other the toppings. Goes hungry. #CherylsBirthday— Ted Laking (@YukonTeddy) April 15, 2015 Question: who calls 2 pizza places? Answer: cheryl

Ex Output:
yes


Ex Input:
Context: Brilliant actor, dear friend and colleague, witty, kind, private man, Roger Rees died this morning. A space is left that cannot be filled.— Patrick Stewart (@SirPatStew) July 11, 2015 Question: who left a space that cannot be filled? Answer: roger rees

Ex Output:

yes