18026
Both 17 beta - estradiol - 2 , 3 - quinone ( E2 - 2 , 3 - Q ) and 17 beta - estradiol - 3 , 4 - quinone ( E2 - 3 , 4 - Q ) are reactive metabolites of estrogen .
 Chemical: 17 beta - estradiol - 2 , 3 - quinone; Chemical: E2 - 2 , 3 - Q; Chemical: 17 beta - estradiol - 3 , 4 - quinone; Chemical: E2 - 3 , 4 - Q; 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 beta - estradiol - 2 , 3 - quinone, E2 - 2 , 3 - Q, 17 beta - estradiol - 3 , 4 - quinone, E2 - 3 , 4 - Q, estrogen 
Answer:
 Chemical: 17 beta - estradiol - 2 , 3 - quinone; Chemical: E2 - 2 , 3 - Q; Chemical: 17 beta - estradiol - 3 , 4 - quinone; Chemical: E2 - 3 , 4 - Q; Chemical: estrogen