7482
Estrogen receptor - alpha ( ER alpha ) expressed by hypothalamic proopiomelanocortin and steroidogenic factor - 1 neurons largely mediates the antiobesity effects of estrogens in females .
 Chemical: Estrogen; Chemical: estrogens
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, estrogens 
Answer:
 Chemical: Estrogen; Chemical: estrogens