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3 , 4 - Dihydroxyphenylglycol ( DHPG ) is a potent antioxidant recently found in the free form in olive oil and table olives .
 Chemical: 3 , 4 - Dihydroxyphenylglycol; Chemical: DHPG
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: 3 , 4 - Dihydroxyphenylglycol, DHPG 
Answer:
 Chemical: 3 , 4 - Dihydroxyphenylglycol; Chemical: DHPG