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.
Example: Context: Our prayers are with the students, educators & families at Independence High School & all the first responders on the scene. #PatriotPride— Doug Ducey (@dougducey) February 12, 2016 Question: at which school were first responders on the scene for? Answer: independence high school
Example solution: yes
Example explanation: Here, the generated label is 'yes' because the given context is useful in answering the question.

Problem: Context: On approach to dwarf planet #Ceres, new @NASA_Dawn images hint at a cratered surface. U NASA (@NASA) January 19, 2015 Question: what kind of surface does ceres have? Answer: a cratered surface

Solution: yes