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.

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
yes

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
yes

Context: Vladimir #Putin: I offer New Year greetings to President Obama & his family, also to President-elect @realDonaldTrump & the American people! 🇷🇺 (@Russia) December 30, 2016 Question: who offered new year greetings? Answer: vladimir putin
yes