21704
Free fatty acids , index of lipid hydrolysis , represented 32 - 39 mol % over total fatty acids .
 Chemical: fatty acids; Chemical: fatty acids
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: fatty acids, fatty acids 
Answer:
 Chemical: fatty acids; Chemical: fatty acids