25505
Evn - 50 is a lignan compounds mixture extracted from Vitex negundo , a widely used herb in traditional Chinese medicine .
 Chemical: Evn - 50; Chemical: lignan
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: Evn - 50, lignan 
Answer:
 Chemical: Evn - 50; Chemical: lignan