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 the dorsal motor nucleus of the vagus an obligatory trigger site of Parkinson 's disease : a critical analysis of alpha-synuclein staging?
Answer: Our results demonstrate a predominant involvement of the SN and NBM in PD but do not support the existence of a medullary induction site of alpha Syn pathology in all PD brains.
[EX A]: no

[EX Q]: Question: Does ondansetron reduce the shivering threshold in healthy volunteers?
Answer: /b>. Ondansetron appears to have little potential for facilitating induction of therapeutic hypothermia.
[EX A]: no

[EX Q]: Question: Does hIV Distal Neuropathic Pain be Associated with Smaller Ventral Posterior Cingulate Cortex?
Answer: The posterior cingulate is thought to be involved in inhibiting the perception of painful stimuli. Mechanistically a smaller posterior cingulate cortex structure may be related to reduced anti-nociception contributing to increased distal neuropathic pain.
[EX A]:
yes