25415
The ethyl acetate fractions of leaf and stem exhibited strong inhibition against Gram - positive bacteria , and were then purified further .
 Chemical: ethyl acetate
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: ethyl acetate 
Answer:
 Chemical: ethyl acetate