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Once the Me-163B was declared operational in July 1944 , Späte was given command of the formally raised JG 400 , ultimately the only front-line unit to use the Me-163 operationally .
 Späte, JG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Späte, JG