17858
Sprague Dawley rats were mated and gavaged on gestational days ( GDs ) 6 - 21 with vehicle , 2 . 5 or 25 mu g / kg bw / day BPA , or 5 or 10 mu g / kg bw / day ethinyl estradiol .
 Chemical: BPA; Chemical: ethinyl estradiol
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: BPA; Chemical: ethinyl estradiol