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.

Question: Do quantitative EEG markers relate to Alzheimer 's disease severity in the Prospective Dementia Registry Austria ( PRODEM )?
Answer: Selected QEEG markers show strong associations with AD severity. Both cognitive and resting state should be used for QEEG assessments.
yes

Question: Does a novel biomechanical device improve gait pattern in patient with chronic nonspecific low back pain?
Answer: Patients with NSLBP treated with the novel biomechanical device for 3 months increased walking speed through longer step length and eliminated asymmetrical differences.
yes

Question: Is balloon-assisted coiling of intracranial aneurysms associated with a higher complication rate?
Answer: When BAC is used frequently, it is a safe and effective technique that is associated with complication rates comparable to those of CC. Although BAC is not associated with more stable anatomical results, it should be considered as an alternative therapeutic option for the treatment of broad-based intracranial aneurysms.

no