You will be given a definition of a task first, then some input of the task.
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.

Context: P!nk's face during Christina Aguilera's Whitney Houston tribute has me rolling on the floor. # keaton bell (@keatonkildebell) November 20, 2017 Question: who was singing a whitney houston tribute? Answer: christina aguilera
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
yes