Complex sentence: On September 4,2015, Boeing announced that the CST-100 would officially be called the CST-100 Starliner, a name that follows the conventions of Boeing Commercial Airplanes' Boeing 787 Dreamliner.
Split into simpler sentences: On September 4,2015, Boeing announced that the CST-100 would officially be called the CST-100 Starliner. The name follows the conventions of Boeing Commercial Airplanes' Boeing 787 Dreamliner.