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: Is cytoglobin upregulated by tumour hypoxia and silenced by promoter hypermethylation in head and neck cancer?
Answer: We conclude that the CYGB gene is regulated by both promoter methylation and tumour hypoxia in HNSCC and that increased expression of this gene correlates with clincopathological measures of a tumour's biological aggression.
yes

Question: Do older men with higher self-rated socioeconomic status have shorter telomeres?
Answer: men with higher self-rated socioeconomic status have shorter telomeres, possibly mediated through psychosocial rather than lifestyle factors or the presence of chronic disease. There may be cultural ethnic and age-related differences in social determinants of health.
yes

Question: Are single anti-P ribosomal antibodies associated with lupus nephritis in patients suffering from active systemic lupus erythematosus?
Answer: There was no association between anti-P ribosomal antibodies and LN but anti-P ribosomal antibodies coexisting with anti-dsDNA antibodies was associated with LN, thereby suggesting that the coexistence of two antibodies is nephritogenic to a greater extent. Additional studies are needed to evaluate the coexistence of kidney-specific antibodies in SLE to determine the biological nature of LN.

no