29416
Evaluation of the positive effects on insulin - resistance and beta - cell measurements of vildagliptin in addition to metformin in type 2 diabetic patients .
 Chemical: vildagliptin; Chemical: metformin
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: vildagliptin, metformin 
Answer:
 Chemical: vildagliptin; Chemical: metformin