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: Do epidural analgesia and laparoscopic technique reduce incidence of prolonged ileus in elective colon resections?
Answer: The incidence of prolonged ileus was similar in the 3 groups studied. However, the epidural and laparoscopic groups experienced earlier return of bowel function and toleration of diet than the nonepidural group.
no