23575
Pickering - Emulsion - Polymerized Polystyrene / Fe2O3 Composite Particles and Their Magnetoresponsive Characteristics .
 Chemical: Polystyrene; Chemical: Fe2O3
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: Polystyrene; Chemical: Fe2O3