9906
Exposure to 40 ppm ZEA diet resulted in reduced percentage of plugged mice with implantation sites , distended uterine appearance , and retained expression of progesterone receptor in D4 . 5 uterine epithelium .
 Chemical: ZEA; Chemical: progesterone
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: ZEA; Chemical: progesterone