10059
In the present study , we investigated the immunomodulatory activity of multi - walled carbon nanotubes ( MWCNTs ) in peripheral blood mononuclear cells ( PBMCs ) from healthy donors and mite - allergic subjects .
 Chemical: carbon
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: carbon 
Answer:
 Chemical: carbon