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 apelin-13 protect the heart against ischemia-reperfusion injury through the RISK-GSK-3-mPTP pathway?
Answer: The protective mechanism of apelin-13 might be that inactivation of GSK-3 could inhibit the opening of mPTP by activating PI3K/Akt and ERK1/2 involved in the reperfusion injury salvage kinase (RISK) pathway.

Ex Output:
yes

Ex Input:
Question: Do elevated serum progesterone levels on the day of human chorionic gonadotropin administration predict outcome in assisted reproduction cycles?
Answer: Serum P levels before hCG administration do not predict the outcome of ART cycles in patients suppressed with GnRH-a before hMG stimulation. Lower fertilization rates observed in the high P cycles did not have an effect on clinical outcome.

Ex Output:
no

Ex Input:
Question: Do plasma protein biomarkers enhance the clinical prediction of kidney injury recovery in patients undergoing liver transplantation?
Answer: These data suggest that plasma protein profiles might improve the prediction of pre-LT kidney injury recovery after LT. However, multicenter, prospective studies are needed to validate these findings and ultimately test the value of such protein panels in perioperative management and decision making.

Ex Output:
yes