26003
They include radical isomerization and dissociation , radical + radical association , and unimolecular reactions of peroxy radicals .
 Chemical: peroxy
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: peroxy 
Answer:
 Chemical: peroxy