instruction:
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.
question:
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.
answer:
yes


question:
Question: Does oral contraceptive use by teenage women affect peak bone mass : a longitudinal study?
Answer: Oral contraceptive pill use by healthy, white, teenage females does not affect acquisition of peak bone mass.
answer:
no


question:
Question: Do heparin-coated circuits prevent renal dysfunction after open heart surgery?
Answer: HC circuits and low-dose heparin can be used to maintain renal function after cardiopulmonary bypass, even in patients with severe kidney disease.
answer:

yes