88363
Due to its enormous velocity and shallow atmospheric entry angle , the object exploded in an air burst over the Chelyabinsk Oblast , at a height of about 23.3 km ( 14.5 miles ) .
 Chelyabinsk Oblast
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chelyabinsk Oblast