22044
Androgen and estrogen play an important role in the pathogenesis of benign prostatic hyperplasia ( BPH ) .
 Chemical: Androgen; 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: Androgen; Chemical: estrogen