21579
Fathead minnows ( Pimephales promelas ) were either exposed to the aromatase inhibitor fadrozole ( 0 . 5 or 30 mu g / l ) continuously for 1 , 8 , 12 , 16 , 20 , 24 , or 28 days or exposed for 8 days and then held in control water ( no fadrozole ) for an additional 4 , 8 , 12 , 16 , or 20 days .
 Chemical: fadrozole; Chemical: fadrozole
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: fadrozole, fadrozole 
Answer:
 Chemical: fadrozole; Chemical: fadrozole