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Spatial localization of the oxygen reduction / evolution reactions on lanthanum strontium cobaltite ( LSCO ) surfaces with perovskite and layered perovskite structures is studied at the sub - 10 nm level .
 Chemical: oxygen; Chemical: lanthanum strontium cobaltite; Chemical: LSCO; Chemical: perovskite; Chemical: perovskite
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, lanthanum strontium cobaltite, LSCO, perovskite, perovskite 
Answer:
 Chemical: oxygen; Chemical: lanthanum strontium cobaltite; Chemical: LSCO; Chemical: perovskite; Chemical: perovskite