18850
As a part of our ongoing effort to identify anti - diabetic constituents from natural sources , we examined the inhibitory activity of the methanol extracts of 12 species of the genus Artemisia , against alpha - glucosidase and protein tyrosine phosphatase 1B ( PTP1B ) .
 Chemical: methanol; Chemical: tyrosine
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: methanol, tyrosine 
Answer:
 Chemical: methanol; Chemical: tyrosine