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The first prototype , powered by a 447 " kW ( 600 " hp ) Nakajima Kotobuki 5 radial engine , flew on 4 February 1935 .
 Nakajima Kotobuki
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Nakajima Kotobuki