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 Q]: Context: Happy Birthday Nelson Mandela. You teach us tolerance, forgiveness and simple kindness. #Saint— Kim Engelbrecht (@kimengelbrecht) July 18, 2012 Question: whose's birthday is it? Answer: nelson mandela
[EX A]: yes

[EX Q]: Context: Onto a 20th lap of @Circuitcat_eng for @LewisHamilton - he's made of tough stuff this fella! #F1 MERCEDES AMG F1 (@MercedesAMGF1) February 20, 2015 Question: where has jessica cheung been since last night Answer: mong kok
[EX A]: no

[EX Q]: Context: My son just got into a fight at school because a kid was wearing white shoes after Labor Day. I'm so proud.— Frank Lowe (@GayAtHomeDad) October 7, 2014 Question: why was his son in a fight? Answer: for wearing white shoes after labor day
[EX A]:
yes