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 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 pharmacological preconditioning using intraportal infusion of L-arginine protect against hepatic ischemia reperfusion injury?
Answer: Pharmacological preconditioning with intraportal L-arginine provided protection against hepatic I/RI in early phases of the reperfusion period. The mechanisms underlying the protective effect may include preservation of the mitochondrial structure and inhibition of caspase-3 activity.
[EX A]: yes

[EX Q]: Question: Is stance control affected by paresis and reflex hyperexcitability : the case of spastic patients?
Answer: It is proposed that body posture, paresis, or monosynaptic reflex hyperexcitability do not affect the control of equilibrium during quiet upright stance. In hemiparetic patients, the decreased amplitude of MLRs might be the main cause of the large postural instability. The results are congruent with the hypothesis of a role for group II afferent input in the reflex control of equilibrium.
[EX A]:
no