Instructions: 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.
Input: Question: Does intra-articular morphine 5 mg after knee arthroscopy produce significant pain relief when administered to patients with moderate to severe pain via an intra-articular catheter?
Answer: IA morphine 5 mg does not produce clinically significant pain relief in patients with moderate or severe pain after knee arthroscopy.
Output:
no