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Lake Afton Public Observatory ( LAPO ) is an astronomical observatory located nine miles ( 14 km ) from Cheney , Kansas , in the Lake Afton County Park .
 Cheney , Kansas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cheney , Kansas