11009
A total of 60 male rats ( 145 +/- 2 . 52 g ) were grouped into four : A , B , C and D , where group A ( the control ) received 1 mL of distilled water orally while those in groups B , C and D ( test groups ) received orally , same volume of trona preparation corresponding to 100 , 200 and 400 mg / kg body weight , respectively , for 28 days .
 Chemical: trona
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: trona