26580
However , the content of t - 2 - heptenal and 1 - octen - 3 - ol in the riboflavin sensitised O / W emulsions was not significantly correlated with the beta - carotene concentration , which indicates that beta - carotene in the lipid particles effectively quenched singlet oxygen .
 Chemical: t - 2 - heptenal; Chemical: 1 - octen - 3 - ol; Chemical: riboflavin; Chemical: beta - carotene; Chemical: beta - carotene; 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: t - 2 - heptenal, 1 - octen - 3 - ol, riboflavin, beta - carotene, beta - carotene, oxygen 
Answer:
 Chemical: t - 2 - heptenal; Chemical: 1 - octen - 3 - ol; Chemical: riboflavin; Chemical: beta - carotene; Chemical: beta - carotene; Chemical: oxygen