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: Is diffuse musculoskeletal pain associated with low vitamin D levels or improved by treatment with vitamin D?
Answer: Low vitamin D levels are not associated with diffuse musculoskeletal pain, and treatment with vitamin D does not reduce pain in patients with diffuse pain who have low vitamin D levels.

Ex Output:
no

Ex Input:
Question: Does gPR39 activate proliferation and differentiation of porcine intramuscular preadipocytes through targeting the PI3K/AKT cell signaling pathway?
Answer: It indicated that GPR39 was a transducer of Zn(2+), and enhanced proliferation and differentiation of porcine intramuscular preadipocytes through activation of the PI3K/Akt signaling pathway.

Ex Output:
yes

Ex Input:
Question: Are elderly patients with community-acquired pneumonia treated according to current guidelines?
Answer: While medical treatment mainly concurred with guidelines, a potential for reduced costs by early discharge planning and use of systematic assessment tools for site-of-care and treatment decisions was indicated. The lack of systematic interventions in the prevention and treatment of malnutrition and functional decline constitutes a threat to a successful final patient outcome.

Ex Output:
no