22170
Electrochemical Oxygen Reduction Behavior of Selectively Deposited Platinum Atoms on Gold Nanoparticles .
 Chemical: Oxygen; Chemical: Platinum
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: Oxygen, Platinum 
Answer:
 Chemical: Oxygen; Chemical: Platinum