25803
The androgen receptor is still a major player in castration - recurrent disease , and though much has been discovered since the early work of Huggins and Hodges regarding how prostate cancer cells manage to avoid the effects of androgen deprivation , survival times for men with advanced prostate cancer have changed only modestly .
 Chemical: androgen; Chemical: androgen
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: androgen, androgen 
Answer:
 Chemical: androgen; Chemical: androgen