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
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: estrogen, estrogen 
Answer:
 Chemical: estrogen; Chemical: estrogen