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: 4 -- For the 1st time in @ChampionsLeague history 4 german teams lost on a matchday. Novelty.— OptaFranz (@OptaFranz) November 26, 2014 Question: what did sutter do today? Answer: drug the boat.

Ex Output:
no


Ex Input:
Context: Can the Scott adviser who suggesed he boycott debate over fan please report to spin room #FLGovDebate— Adam Smith (@adamsmithtimes) October 15, 2014 Question: how did donald trump feel earlier? Answer: shackled

Ex Output:
no


Ex Input:
Context: David @Letterman announced he's retiring in 2015. It's been 31 incredible years. Television won't be the same without you, Dave.— Ellen DeGeneres (@TheEllenShow) April 3, 2014 Question: who is retiring in 2015? Answer: @letterman

Ex Output:

yes