8800
The use of a tissue - selective estrogen complex ( TSEC ) has been proposed as a novel menopausal hormone therapy strategy to eliminate the requirement for a progestogen .
 Chemical: estrogen; Chemical: progestogen
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: progestogen