23508
Multifunctional Hybrid Materials From Poly ( 3 - Hydroxybutyrate ) , TiO2 Nanoparticles , and Chitosan Oligomers by Combining Electrospinning / Electrospraying and Impregnation .
 Chemical: Poly ( 3 - Hydroxybutyrate ); Chemical: TiO2
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: Poly ( 3 - Hydroxybutyrate ), TiO2 
Answer:
 Chemical: Poly ( 3 - Hydroxybutyrate ); Chemical: TiO2