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High antioxidant capacity of phytosteryl sinapates was observed using both oxygen radical absorbance capacity ( ORAC ) assay and cooked ground meat model system .
 Chemical: phytosteryl sinapates; Chemical: oxygen
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: phytosteryl sinapates, oxygen 
Answer:
 Chemical: phytosteryl sinapates; Chemical: oxygen