In this task, you are given a context tweet, a question and corresponding answer of given question. Your task is to classify this question-answer pair into two categories: (1) "yes" if the given answer is right for question, and (2) "no" if the given answer is wrong for question.

Example Input: Context: Detroiter walks 21 miles in work commute Detroit Free Press (@freep) February 1, 2015 Question: how many miles did the detroiter walk Answer: 21 miles
Example Output: yes

Example Input: Context: #DemocracySpring sitting in -- said they'll try to enter arena perimeter if not arrested... one delegate turned back Greg Krieg (@GregJKrieg) July 25, 2016 Question: how many delegates were turned back? Answer: one
Example Output: yes

Example Input: Context: 1. House health-care bill can't pass Senate w/o major changes. To my friends in House: pause, start over. Get it right, don't get it fast. Tom Cotton (@TomCottonAR) March 9, 2017 Question: what prevents the bill from passing? Answer: major changes must be made.
Example Output:
yes