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: Are wedding rings a significant source of bacterial contamination following surgical scrubbing?
Answer: This preliminary study would suggest that a traditional band wedding ring is not a source of a bacterial load following a standard surgical scrub procedure and, as such, there is no requirement for their removal pre-operatively.
[A]: no

[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: Is telling adolescents a parent dying?
Answer: Families inform adolescents about the progression of a parent's terminal illness in characteristic ways that remain fairly consistent throughout the illness, and are aimed at easing the adolescents' burden and distress. The families engaged in the process of disclosure in one of four ways: measured telling, skirted telling, matter-of-fact telling, and inconsistent telling. These results will inform the development of interventions that assist families with disclosure and are tailored to each family's communication style.
[A]:
yes