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OSE are recognized by innate ' pattern recognition receptors ' , such as scavenger receptors present on dendritic cells and monocyte / macrophages , as well as by innate proteins , such as IgM natural antibodies and soluble proteins , such as C - reactive protein and complement factor H .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None