18678
Upon photolysis , the best caged derivative was found to be BHC - cholesterol whose quantum yield was determined to be 0 . 032 at 350 nm .
 Chemical: BHC; Chemical: cholesterol
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: BHC, cholesterol 
Answer:
 Chemical: BHC; Chemical: cholesterol