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: Is acinetobacter baumannii infection in prior ICU bed occupants an independent risk factor for subsequent cases of ventilator-associated pneumonia?
Answer: ICU admission or the hospitalization of patients infected by Acinetobacter baumannii increases the risk of AbVAP by subsequent patients.

Answer: yes

Question: Question: Is a gain-of-function mutation in the cardiac pacemaker HCN4 channel increasing cAMP sensitivity associated with familial Inappropriate Sinus Tachycardia?
Answer: This is the first report of a gain-of-function HCN4 mutation associated with IST through increased sensitivity to cAMP-dependent activation.

Answer: yes

Question: Question: Is suboptimal response to adefovir dipivoxil therapy for chronic hepatitis B in nucleoside-naive patients due to pre-existing drug-resistant mutants?
Answer: Suboptimal response to ADV might result from a host pharmacological effect or from patient compliance issues rather than from a reduced susceptibility of HBV to ADV.

Answer:
no