20544
Understanding the role of GPER in estrogen signaling may help resolve some of the controversies associated with estrogen and cardiovascular function .
 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