Q: 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 diclofenac premedication but not intra-articular ropivacaine alleviate pain following day-case knee arthroscopy?
Answer: Diclofenac premedication p.o. reduced the VAS scores at eight hours postoperatively while intra-articular ropivacaine did not.
A:
yes