23165
Tensile Lattice Strain Accelerates Oxygen Surface Exchange and Diffusion in La1 - xSrxCoO3 - delta Thin Films .
 Chemical: Oxygen
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 
Answer:
 Chemical: Oxygen