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The hot water extract of immature calamondin peel exhibited the highest oxygen radical absorbance capacity ( ORAC ) , reducing power , and superoxide scavenging effect .
 Chemical: oxygen; Chemical: superoxide
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: oxygen, superoxide 
Answer:
 Chemical: oxygen; Chemical: superoxide