Definition: 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 adjunctive analgesia with intravenous propacetamol reduce morphine-related adverse effects?
Answer: Although propacetamol induced a small morphine-sparing effect, it did not change the incidence of morphine-related adverse effects in the postoperative period. Moreover, no benefit could be demonstrated in patients with severe postoperative pain.
Output:
no