17946
Once - daily initiation of basal insulin as add - on to metformin : a 26 - week , randomized , treat - to - target trial comparing insulin detemir with insulin glargine in patients with type 2 diabetes .
 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: metformin 
Answer:
 Chemical: metformin