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Chicago Executive Airport , formerly known as Palwaukee Municipal Airport , is a public airport located 18 nautical miles ( 33 km ) northwest of Chicago , in the village of Wheeling in Cook County , Illinois , United States .
 Chicago, Wheeling, Cook County, Illinois, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chicago, Wheeling, Cook County, Illinois, United States