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.

Ex Input:
Question: Does the extent of lymphadenectomy for pTXNO prostate cancer affect prostate cancer outcome in the prostate specific antigen era?
Answer: The extent of lymphadenectomy does not appear to affect prostate cancer outcome in lymph node negative cases. This includes patients with high preoperative PSA, high pathological grade and extracapsular disease. These results suggest that under staging is not present in apparently node negative cases with limited lymphadenectomy and, even if present, its impact on outcome is likely to be negligible.

Ex Output:
no


Ex Input:
Question: Are health promotion lifestyle profile scores associatedwith obesity in high school students?
Answer: Adolescence is an era of development when individuals start to implement their own features to life. According to this study adolescents do not perform health promoting lifestyles whether they are obese or not.

Ex Output:
no


Ex Input:
Question: Do pancreatic cancer patients who smoke and drink are diagnosed at younger ages?
Answer: Cigarette smoking and alcohol consumption were associated with younger age at pancreatic cancer presentation and have a combined effect on diagnosis age. Past cigarette smoking is less influential. Smoking cessation programs could help prevent pancreatic cancer.

Ex Output:

yes