7200
50 caliber machine gun atop a tank 's turret , as four of the ground-used " heavy barrel " ( M2HB ) guns were mounted together on the American Maxson firm 's M45 Quadmount weapon ( as a direct answer to the " Flakvierling " ) , which were often mounted on the back of a half-track to form the Half Track , M16 GMC , Anti-Aircraft .
 organization: American Maxson
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: American Maxson