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 endometrial thickness on the day of human chorionic gonadotropin injection adversely affect pregnancy or implantation rates following in vitro fertilization-embryo transfer?
Answer: No adverse effects of a thickened endometrium were demonstrated on implantation, pregnancy, or abortion rates in the first IVF-ET cycle. These findings fail to corroborate with those of Weissman et al. and support those of Yakin et al.

Ex Output:
no


Ex Input:
Question: Does in vivo gene transfer of endothelial nitric oxide synthase to carotid arteries from hypercholesterolemic rabbits enhance endothelium-dependent relaxations?
Answer: Adenovirus-mediated gene transfer of eNOS to carotid arteries of cholesterol-fed animals improves endothelium-dependent relaxation when an optimal viral titer is administered.

Ex Output:
yes


Ex Input:
Question: Is inflammatory infiltrate ( prostatitis ) in whole mounted radical prostatectomy specimens from black and white patients an etiology for racial difference in prostate specific antigen?
Answer: To our knowledge no significant racial difference exists in the extent of inflammatory infiltrate, and inflammation was not the etiology of the racial difference in serum PSA levels in this clinically localized prostate cancer cohort.

Ex Output:

no