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In rats of the experimental group , the mean concentration of : PRL was more than twice higher , whereas T concentration was almost twice lower than that in the control group .
 Chemical: PRL; Chemical: T
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: PRL; Chemical: T