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Three years later , Boris Shpitalniy together with Irinarkh Komaritsky designed the ShKAS machine gun , a 7.62 mm machine gun widely used by Soviet aircraft in the 1930s and during World War II .
 Boris Shpitalniy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Boris Shpitalniy