1182
After reduction of ribavirin , 27 of 37 patients could continue combination therapy for a total of 24 weeks ( group A ) .
 Chemical: ribavirin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: ribavirin 
Answer:
 Chemical: ribavirin