2132
A DFT study on the initial stage of thermal degradation of Poly ( methyl methacrylate ) / carbon nanotube system .
 Chemical: Poly ( methyl methacrylate ); 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: Poly ( methyl methacrylate ), carbon 
Answer:
 Chemical: Poly ( methyl methacrylate ); Chemical: carbon