22551
Defect Chemistry of Oxide Nanomaterials with High Surface Area : Ordered Mesoporous Thin Films of the Oxygen Storage Catalyst CeO2 - ZrO2 .
 Chemical: Oxide; Chemical: Oxygen
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: Oxide; Chemical: Oxygen