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: Does increased expression of prostasin contribute to early-onset severe preeclampsia through inhibiting trophoblast invasion?
Answer: These findings suggest that prostasin may suppress the invasion process in preeclampsia by attenuating MMP2 and MMP9 secretion.

Ex Output:
yes

Ex Input:
Question: Is ischemic preconditioning cardioprotective in senescent human myocardium?
Answer: Our data indicate that ischemic preconditioning has no beneficial effect on the postischemic functional recovery of senescent human myocardium.

Ex Output:
no

Ex Input:
Question: Do diets fail : the success of medical nutrition therapy in patients with diabetes?
Answer: The health-care team can provide practical and useful information to patients with diabetes that will improve management of their disease and enhance their well-being.

Ex Output:
no