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 constitutive secretion of Interleukin-4 dictate CD133+ side population cells to resist drug treatment and cell death?
Answer: Our data suggest that the autocrine secretion of IL-4 is a potential target for the development of novel anticancer drugs to prevent the CSCs-mediated therapy failure and tumorigenesis.

Ex Output:
yes


Ex Input:
Question: Are complaints of sleep disturbances associated with cardiovascular disease : results from the Gutenberg Health Study?
Answer: Given the high prevalence of complaints of sleep disturbances and their strong impact on health status, increased efforts should be undertaken for their identification and treatment.

Ex Output:
yes


Ex Input:
Question: Do comparative metabolomics in vegans and omnivores reveal constraints on diet-dependent gut microbiota metabolite production?
Answer: Evidently, residence in globally distinct societies helps determine the composition of the gut microbiota that, in turn, influences the production of diet-dependent gut microbial metabolites.

Ex Output:

yes