28508
Exposure to 17 alpha - ethinylestradiol ( EE2 ) , a synthetic estrogen , has previously been shown to decrease reproductive endocrine status and egg production in northern mummichog ( Fundulus heteroclitus macrolepidotus ) .
 Chemical: 17 alpha - ethinylestradiol; Chemical: EE2; 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: 17 alpha - ethinylestradiol, EE2, estrogen 
Answer:
 Chemical: 17 alpha - ethinylestradiol; Chemical: EE2; Chemical: estrogen