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: Do an update on long-term outcome of curative hepatic resection for hepatocholangiocarcinoma?
Answer: Hepatocholangiocarcinoma entails poor long-term outcome after potentially curative hepatectomy. Other modalities of treatment should be explored in order to prolong survival of patients with this disease.

Ex Output:
yes


Ex Input:
Question: Does nonresponse to pre-operative chemotherapy preclude long-term survival after liver resection in patients with colorectal liver metastases?
Answer: Liver resection offers a long-term survival benefit for patients with CRM, even when tumor growth proceeds during pre-operative chemotherapy.

Ex Output:
no


Ex Input:
Question: Is serum interleukin-10 but not interleukin-6 related to clinical outcome in patients with resectable hepatocellular carcinoma?
Answer: In patients with HCC, the preoperative serum IL-10 level is related to the clinical outcome. IL-10 may play an important role in the progression of HCC.

Ex Output:

yes