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Design and development The design of the KD6G was based on the earlier Globe KD2G Firefly target drone , featuring a mid-wing configuration with a twin-fin empennage , but instead of a pulsejet powerplant as in the KD2G the KD6G was fitted with a single piston engine in a tractor configuration .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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