16805
The results indicate that abstraction of a hydrogen atom ( by live polymer chains ) from the methyl group in methyl acrylate , the methylene group in ethyl acrylate , and methylene groups in n - butyl acrylate are the most likely mechanisms of CTM .
 Chemical: hydrogen; Chemical: methyl; Chemical: methyl acrylate; Chemical: methylene; Chemical: ethyl acrylate; Chemical: methylene; Chemical: n - butyl acrylate
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: hydrogen, methyl, methyl acrylate, methylene, ethyl acrylate, methylene, n - butyl acrylate 
Answer:
 Chemical: hydrogen; Chemical: methyl; Chemical: methyl acrylate; Chemical: methylene; Chemical: ethyl acrylate; Chemical: methylene; Chemical: n - butyl acrylate