22718
We report a molecular dynamics ( MD ) simulation study of protein adsorption on the surface of nanosized carbon allotropes , namely single - walled carbon nanotubes ( SWNT ) considering both the convex outer surface and the concave inner surface , together with a graphene sheet for comparison .
 Chemical: carbon; Chemical: carbon; Chemical: graphene
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, carbon, graphene 
Answer:
 Chemical: carbon; Chemical: carbon; Chemical: graphene