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However , in riboflavin photosensitized O / W emulsions , 100 and 1000 mu M beta - carotene inhibited lipid oxidation .
 Chemical: riboflavin; Chemical: beta - carotene
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: riboflavin; Chemical: beta - carotene