Complex sentence: Over 1.5 million vehicles a year are produced in 13 manufacturing and assembly operations in eight countries, which are then sold and serviced through a network of distributors and dealers covering 172 countries.
Split into simpler sentences: Over 1.5 million vehicles a year are produced in 13 manufacturing and assembly operations in eight countries. These are then sold and serviced through a network of distributors and dealers covering 172 countries.