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: Kurt Helin @basketballtalkCeltics’ Jaylen Brown, reportedly Spurs’ Jonathon Simmons invited to dunk contest , 5:39:15 PM Question: to what is jonathon simmons invited? Answer: a dunk contest.
[EX A]: yes

[EX Q]: Context: Katy Perry's Halftime in a nutshell Travis Lattner (@TLatt7) February 2, 2015 Question: what is this twitter page currently discussing Answer: katy perry's halftime show
[EX A]: yes

[EX Q]: Context: There was an active shooter targeting multiple downtown buildings, including APD Headquarters. This resulted in an Ofc. Involved Shooting.— Austin Police Dept. (@Austin_Police) November 28, 2014 Question: what do the people think hrc needs to do more Answer: smile
[EX A]:
no