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 low serum bilirubin concentration a predictor of chronic kidney disease?
Answer: Our study demonstrated that serum total bilirubin concentration could be a novel risk factor for the progression of CKD, defined as eGFR <60 ml/min/1.73 m(2), in the general population.

Ex Output:
yes


Ex Input:
Question: Is multivitamin-mineral supplementation as efficacious as is iron supplementation in improving hemoglobin concentrations in nonpregnant anemic women living in Mexico?
Answer: MM supplements may not be as efficacious as is iron alone in improving the hemoglobin status of anemic women.

Ex Output:
no


Ex Input:
Question: Do cold snare piecemeal resection of colonic and duodenal polyps ≥1 cm?
Answer: Cold snare polypectomy for large duodenal and colonic polyps is technically feasible and may have a favorable safety profile compared to standard electrocautery-based endoscopic resection. Comparative trials are required to determine the relative safety and efficacy of cold snare techniques for complete and durable resection of large polyps compared to standard hot snare methods.

Ex Output:

yes