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.

[Q]: Question: Does dNA Methylation of MMP9 be Associated with High Levels of MMP-9 Messenger RNA in Periapical Inflammatory Lesions?
Answer: The present study suggests that the unmethylated status of the MMP9 gene in periapical lesions may explain the observed up-regulation of messenger RNA transcription in these lesions.
[A]: yes


[Q]: Question: Does chronic reduction of myocardial ischemia attenuate coronary collateral development in miniswine?
Answer: We conclude that growth and development of the coronary collateral circulation measured functionally during exercise at 90% of maximal heart rate is unrelated to the extent and duration of myocardial ischemia in this model.
[A]: no


[Q]: Question: Do postmenopausal women without previous or current vasomotor symptoms flush after abruptly abandoning estrogen replacement therapy?
Answer: Postmenopausal women without previous or current vasomotor symptoms did not develop such symptoms when estrogen replacement therapy was first instituted and then abruptly stopped. Probably other factors than the rate with which estrogen concentrations decrease determine whether or not a woman will develop vasomotor symptoms. Evidently, estrogens can be prescribed to a woman who has no vasomotor symptoms, without much risk of inducing such symptoms if she decides to abandon therapy, even after 3 months of treatment.
[A]:
no