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: Are higher rates of viral suppression with nonnucleoside reverse transcriptase inhibitors compared to single protease inhibitors explained by better adherence?
Answer: A higher proportion of individuals using NNRTI-based regimens had viral suppression when compared to those taking single-PI-containing regimens, and this association was not confounded by higher levels of adherence. These results suggest that improved viral suppression on NNRTI regimens compared to single-PI regimens is more closely associated with regimen potency than higher levels of adherence.

Ex Output:
no

Ex Input:
Question: Does gender difference affect the outcomes of eccentric rotational acetabular osteotomy used in hip dysplasia?
Answer: The mean operative time and the blood loss were not significantly different between male and female patients. Postoperative CE angle tended to be smaller in male than female patients. The survival rate was not significantly different between males and females. Gender difference did not affect the clinical outcomes of ERAO in patients with hip dysplasia.

Ex Output:
no

Ex Input:
Question: Is parvovirus B19 associated with benign testes as well as testicular germ cell tumours?
Answer: This confirms the presence of parvovirus B19 in a proportion of germ cell tumours; however, in one patient, the virus was widespread in the tissue components and not confined to tumour cells. In addition, the virus was present in control benign testes. These data suggest that B19 might not be of aetiological importance in germ cell tumours of testis.

Ex Output:
yes