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: Is muscle dysfunction during exercise of a single skeletal muscle in rats with congestive heart failure associated with reduced muscle blood supply?
Answer: The cause of contractile dysfunction in a single exercising skeletal muscle in rats with CHF cannot be explained simply by reduced blood supply. In addition, absence of changes in high-energy phosphates and metabolites indicate that the oxidative metabolism of SOL is intact in rats with CHF.

A: no
****
Q: Question: Does developmental changes in spatial distribution of in vivo fluorescence and epidermal UV absorbance over Quercus petraea leave?
Answer: The spatial pattern of epidermal UV-screen over the area of oak leaves is related to leaf anatomy during development. In vivo spectroscopy and fluorescence imaging of the leaf surface showed the distribution of pigments within the leaf and hence can provide a tool to monitor optically the leaf development in nature.

A: yes
****
Q: Question: Are tools for assessing the content of guidelines needed to enable their effective use -- a systematic comparison?
Answer: None of the tools analyzed enables the structured and comprehensive assessment of the content of guideline recommendations with special regard to their reliability and validity. All tools contribute towards the judicious use of evidence syntheses by supporting their systematic development or assessment. However, further progress is needed, particularly with regard to the assessment of content quality. This includes comprehensive operationalization and documentation of the assessment process to ensure reliability and validity, and therefore to enable the effective use of trustworthy guidelines in the health care system.

A:
yes
****