6704
Protein oxidation was assessed by measuring protein carbonyl content , oxidised amino acids , sulfhydryl groups and immuno - blotting against carbonyl groups .
 Chemical: carbonyl; Chemical: amino acids; Chemical: sulfhydryl; Chemical: carbonyl
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: carbonyl, amino acids, sulfhydryl, carbonyl 
Answer:
 Chemical: carbonyl; Chemical: amino acids; Chemical: sulfhydryl; Chemical: carbonyl