177900
The plane made first flights in 1940-1941 on Kharkov Aviation Plant ( KhAZ ) 135 ( with Grushin as a Chief designer of KhAZ OKB ) , but after the war began it was destroyed in an air raid .
 Kharkov Aviation, Grushin
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 Aviation, Grushin