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 Input:
Question: Do acute pain and central nervous system arousal restore impaired hypoxic ventilatory response during sevoflurane sedation?
Answer: The observation that acute pain caused an increase in baseline ventilation with no effect on the acute hypoxic ventilatory response indicates that acute pain interacted with ventilatory control without modifying the effect of low-dose sevoflurane on the peripheral chemoreflex loop. Acute pain increased the level of arousal significantly during sevoflurane inhalation but did not restore the approximately 30% depression of the acute hypoxic ventilatory response by sevoflurane. The central nervous system arousal state per se did not contribute to the impairment of the acute hypoxic ventilatory response by sevoflurane.

Ex Output:
no


Ex Input:
Question: Is chronic cerebrospinal venous insufficiency associated with chronic venous disorders : A case-control study?
Answer: We found no association of CCSVI with the presence of CVD or family history of varicose veins.

Ex Output:
no


Ex Input:
Question: Is obesity associated with greater inflammation and monocyte activation among HIV-infected adults receiving antiretroviral therapy?
Answer: Obesity was prevalent and independently associated with greater monocyte activation and systemic inflammation. Research is needed to determine how adipose tissue excess is functionally related to persistent immunologic abnormalities among HIV-infected persons with viral suppression.

Ex Output:

yes