Teacher:Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Teacher: Now, understand the problem? Solve this instance: Question: Are flexion and extension views cost-effective in a cervical spine clearance protocol for obtunded trauma patients?
Answer: Flexion-extension studies were not a cost-effective part of the protocol, and they were dropped.
Student:
no