8806
Gene expression studies demonstrated that CE and E ( 2 ) were equally potent on expression of cMyc , pS2 , and WNT1 inducible signaling pathway protein 2 , whereas the stimulatory effects of CE on progesterone receptor and amphiregulin expression were weaker than E ( 2 ) .
 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: progesterone