9547
A pathological hallmark of Alzheimer ' s disease ( AD ) , aggregation and deposition of amyloid - beta peptides , has been recognized as a potent activator of microglia - mediated neuroinflammation and neuronal dysfunction .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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