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 implementation of the acute care surgery model provide benefits in the surgical treatment of the acute appendicitis?
Answer: The ACS model may improve abdominal surgical efficiency and quality. Our study results echoed the benefits of the implementation of the ACS model shown in North America.
Output:
yes