11959
Five phenolic acids ( protocatechuic acid , p - hydroxybenzoic acid , vanillic acid , p - coumaric acid , and ferulic acid ) proved to be stable , while two others ( caffeic acid and sinapic acid ) were degraded under ultrasound treatment .
 Chemical: phenolic acids; Chemical: protocatechuic acid; Chemical: p - hydroxybenzoic acid; Chemical: vanillic acid; Chemical: p - coumaric acid; Chemical: ferulic acid; Chemical: caffeic acid; Chemical: sinapic acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: phenolic acids; Chemical: protocatechuic acid; Chemical: p - hydroxybenzoic acid; Chemical: vanillic acid; Chemical: p - coumaric acid; Chemical: ferulic acid; Chemical: caffeic acid; Chemical: sinapic acid