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 Q]: Question: Does stopcock lumen contamination reflect the full burden of bacterial intravenous tubing contamination : analysis using a novel injection port?
Answer: Effluent culture is a more sensitive marker of IV fluid system contamination than injection port lumen culture. A novel protective device on the stopcock (Port Guide) significantly reduced IV fluid system bacterial contamination.
[EX A]: no

[EX Q]: Question: Does diabetes influence oral oncogenesis through fibroblast growth factor receptors?
Answer: It seems that diabetes does not affect the FGFR-2 and FGFR-3 pattern of expression throughout the various stages of oral oncogenesis.
[EX A]: no

[EX Q]: Question: Does gait analysis correlate with clinical and MR imaging parameters in patients with symptomatic lumbar spinal stenosis?
Answer: According to the results of this study MRI findings failed to show a major clinical relevance when evaluating the walking distance in patients with lumbar spinal stenosis and, therefore, should be treated with some caution as a predictor of walking distance. In determining the disease pattern of spinal stenosis functional back capacity and BMI might play a more active role than previously thought.
[EX A]:
no