Complex sentence: Pachi is the name of the mascot of the 2015 Pan American Games and the 2015 Parapan American Games, which are being held in Toronto, Canada, in 2015.
Split into simpler sentences: Pachi is the name of the mascot of the 2015 Pan American Games and the 2015 Parapan American Games. The Games are being held in Toronto, Canada, in 2015.