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: 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: You can't really look at tonight's results and conclude that Democrats are anything other than the current favorites to pick up the U.S. House in 2018. Dave Wasserman (@Redistrict) November 8, 2017 Question: what year are they expected to pick up seats in the house? Answer: 2018
[EX A]: yes

[EX Q]: Context: I've never wanted to have children, so I had an abortion. I'm thriving, without guilt, without shame, without apologies. #ShoutYourAbortion favianna rodriguez (@favianna) September 21, 2015 Question: what did favianna rodriguez do to prevent having a baby? Answer: she had an abortion.
[EX A]:
yes