instruction:
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.
question:
Context: At 1:21 before launch, a thrust vector control actuator for the Falcon 9's 2nd stage failed to perform as expected. @SpaceX is evaluating.— NASA (@NASA) January 6, 2015 Question: what happened to the thrust vector control Answer: it failed
answer:
yes


question:
Context: The guy in front of her just shouted at her. He's a true hero. — Ryan Case (@film114) September 29, 2014 Question: what did the guy do? Answer: shouted at her.
answer:
yes


question:
Context: This is a real achievement: There's no proper skating stadium in Czech Republic, Sablikova trained sliding on foil wearing socks.#CNNSochi— Ivana Kottasová (@IvanaKottasova) February 19, 2014 Question: what is the country mentioned in the tweet? Answer: he died
answer:

no