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 progesterone receptor and PTEN expression predict survival in patients with low- and intermediate-grade pancreatic neuroendocrine tumors?
Answer: Combined immunohistochemical assessment of PR and PTEN may help identify a small subset of PanNETs with more aggressive behavior and may aid in risk stratification.

Ex Output:
yes

Ex Input:
Question: Is meconium ileus in cystic fibrosis linked to central repetitive region length variation in MUC1 , MUC2 , and MUC5AC?
Answer: The genetic length variants in the central repetitive region of three MUC genes studied are not associated with MI in subjects with CF.

Ex Output:
no

Ex Input:
Question: Does imaging predict the clinical outcome of bacterial vertebral osteomyelitis?
Answer: Imaging abnormalities often persist in patients with bacterial spondylodiscitis despite a favourable clinical and biological response to antibiotic treatment. They are not associated with relapses, neurological sequelae or persistent pain. Imaging controls are not necessary when bacterial spondylodiscitis responds favourably to treatment.

Ex Output:
no