19950
Co - administration of RSG and ALN prevented the bone loss associated with RSG treatment .
 Chemical: RSG; Chemical: ALN; Chemical: RSG
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: RSG, ALN, RSG 
Answer:
 Chemical: RSG; Chemical: ALN; Chemical: RSG