7827
Treatment with the positive control chemical 3 , 3 ' , 5 - triiodo - l - thyronine ( T3 ) significantly decreased whole - body thyroxin ( T4 ) concentrations , increased whole - body T3 concentrations , and upregulated mRNA expression involved in the HPT axis as a compensatory mechanism .
 Chemical: 3 , 3 ' , 5 - triiodo - l - thyronine; Chemical: thyroxin ( T4 )
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: 3 , 3 ' , 5 - triiodo - l - thyronine, thyroxin ( T4 ) 
Answer:
 Chemical: 3 , 3 ' , 5 - triiodo - l - thyronine; Chemical: thyroxin ( T4 )