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 the selective serotonin reuptake inhibitor fluoxetine change rectal sensitivity and symptoms in patients with irritable bowel syndrome : a double blind , randomized , placebo-controlled study?
Answer: Fluoxetine does not change rectal sensitivity in IBS patients. Possible beneficial effects on pain perception need to be confirmed in larger trials.
no