Given the task definition and input, reply with output. 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.

Question: Does nitrous oxide change the incidence of postoperative delirium or cognitive decline in elderly surgical patients?
Answer: Exposure to N(2)O resulted in an equal incidence of postoperative delirium when compared with no exposure to N(2)O.
no