Complex sentence: The Ursus C-45 and C-451 was a popular model of tractor, manufactured from 1947 to 1959 by the Ursus Factory in Warsaw, and from 1960 to 1965 by Mechanical Plant in Gorzów Wielkopolski.
Split into simpler sentences: The Ursus C-45 and C-451 was a popular Polish model of tractor. It was manufactured from 1947 to 1959 by the Ursus Factory in Warsaw, and from 1960 to 1965 by Mechanical Plant in Gorzów Wielkopolski.