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MATERIALS AND METHODS : To determine the estrogen - like effect of Cyperi Rhizoma extract ( CRE ) , we measured luciferase expression after transfection of a promoter construct containing an estrogen response element ( ERE ) and treatment of CRE .
 Chemical: estrogen; Chemical: estrogen
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: estrogen; Chemical: estrogen