14660
Sexually mature male Wistar rats ( weighing 300 - 320g and each group six animals ) were given mercuric chloride ( 1mg / kg bw ) and / or sodium selenite ( 0 . 25mg / kg bw ) + vitamin E ( 100mg / kg ) daily via gavage for 4weeks .
 Chemical: mercuric chloride; Chemical: sodium selenite; Chemical: vitamin E
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: mercuric chloride, sodium selenite, vitamin E 
Answer:
 Chemical: mercuric chloride; Chemical: sodium selenite; Chemical: vitamin E