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: Is lymphocyte inhibition compromised in mesenchymal stem cells from psoriatic skin?
Answer: This study demonstrated abnormalities in MSCs derived from psoriatic skin lesions. We suggest that the attenuated inhibitory effect on T-cell proliferation might be one of the pathogenic mechanisms of psoriasis.
[EX A]: yes

[EX Q]: Question: Is sleep disturbance after fracture related to emotional well-being rather than functional result?
Answer: At 12-month follow-up, poor sleep was independently associated with poor emotional status but not associated with poor functional status. The mental health status of patients with sleep difficulty in the latter stages of fracture healing should be carefully assessed to provide the highest level of care. The results of this study should allow orthopaedic trauma surgeons to counsel patients regarding expectations of difficulty sleeping after acute fractures.
[EX A]: yes

[EX Q]: Question: Does polarization of the vacuolar adenosine triphosphatase delineate a transition to high-grade pancreatic intraepithelial neoplasm lesions?
Answer: The v-ATPase regulates Wnt/β-catenin and EGF receptor signaling in PanINs.
[EX A]:
yes