9900
To test this hypothesis , newly weaned ( 3 weeks old ) C57BL / 6J female mice were exposed to 0 , 0 . 002 , 4 , 10 , and 40 ppm ZEA and 0 . 05 ppm diethylstilbestrol ( positive control ) in phytoestrogen - free AIN - 93G diet .
 Chemical: ZEA; Chemical: diethylstilbestrol
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: diethylstilbestrol