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 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: Is polymorphism Ala54Thr of fatty acid-binding protein 2 gene associated with stroke risk in Han population of Hunan China?
Answer: Our study shows that Ala54Thr of FABP2 may be not associated with stroke risk but associated with plasma TG level of stroke patients for Hunan Han population of China.

Ex Output:
no

Ex Input:
Question: Do adventitial cells contribute to neointimal mass after balloon angioplasty of the rat common carotid artery?
Answer: Despite the prominent role that adventitial myofibroblasts seem to have in the postangioplasty remodeling process, they do not migrate to the medial or intimal layers in the rat carotid artery angioplasty model.

Ex Output:
no