28344
In this study , 30 Wistar rats were randomly divided into three groups : a control group , a sodium fluoride ( NaF ) + EGb group , and a NaF group .
 Chemical: sodium fluoride; Chemical: NaF; Chemical: NaF
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: sodium fluoride, NaF, NaF 
Answer:
 Chemical: sodium fluoride; Chemical: NaF; Chemical: NaF