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Beginning in 1957 works started to convert the former air force base into an air base to house units of the recently formed German Army 's Aviation Corps , utilising the facilities of the previous occupant .
 German Army, Aviation Corps
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 German Army, Aviation Corps