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Plot Ellis ( Onslow Stevens ) runs Trans-Andean Air Service , a run-down company transporting supplies from Dalgado , a tiny , remote outpost , over the Andes Mountains to some mines .
 Onslow Stevens, Andes Mountains
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Onslow Stevens, Andes Mountains