13692
Metformin is an antidiabetic agent that decreases hyperglycemia by different pathways than insulin ; therefore , we asked whether metformin affects postburn ER stress and hepatic metabolism .
 Chemical: Metformin; 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, metformin 
Answer:
 Chemical: Metformin; Chemical: metformin