16413
In this work we report on the preparation , characterization , and properties of a thermally treated lignin - derived , phenolic - rich fraction ( PRF ) of wood pyrolysis bio - oil obtained by ethyl acetate extraction .
 Chemical: ethyl acetate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ethyl acetate