Complex sentence: The TAI/AgustaWestland T129 is an attack helicopter developed by Turkish Aerospace Industries (TAI), with AgustaWestland as the primary partner, using the Agusta A129 Mangusta as a base model.
Split into simpler sentences: The TAI/AgustaWestland T129 is an attack helicopter based on the Agusta A129 Mangusta. The T129 was developed by Turkish Aerospace Industries (TAI), with AgustaWestland as the primary partner, using as a base model.