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Major General Chia J. Chu ( ) was an aviation engineer in charge of manufacturing and development of military aircraft for the National Revolutionary Army in the 1930s to 1950s .
 Chia, Chu, National Revolutionary Army
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chia, Chu, National Revolutionary Army