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In 1926 , the factory Komsomol assembly sent him to study in an institute in Kharkov , followed by a transfer without test to mechanical faculty in the Leningrad Polytechnical Institute to study engineer-design for tractors and cars .
 Kharkov, Leningrad Polytechnical Institute
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kharkov, Leningrad Polytechnical Institute