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.
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Question: Question: Does sympathetic nerve activity reduce proprioceptive acuity in humans?
Answer: The present findings contradict previous reports from animal studies and the hypothesis that sympathetic nerve activity reduces proprioceptive acuity.

Answer: no


Question: 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.

Answer: yes


Question: Question: Is malnutrition a prognostic factor in patients with hepatocellular carcinoma ( HCC )?
Answer: A significant proportion of patients with HCC is malnourished or at risk for malnutrition. Screening questionnaires and BIA measurement are superior to pure anthropometric measurements to identify the condition that negatively influences survival. The phase angle derived from body impedance analysis is an independent prognostic factor in patients with HCC.

Answer:
yes