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Nikolay Leonidovich Dukhov Nikolay Leonidovich Dukhov ( Russian : Николай Леонидович Духов ) ( 26 October 1904 – 1 May 1964 ) was a Soviet designer of cars , tractors , tanks and nuclear weapons .
 Nikolay, Dukhov Nikolay, Dukhov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nikolay, Dukhov Nikolay, Dukhov