Complex sentence: The 2018 IIHF World Junior Championship is the 42nd Ice Hockey World Junior Championship and was hosted by the city of Buffalo, New York at the KeyBank Center and HarborCenter.
Split into simpler sentences: The 2018 IIHF World Junior Championship is the 42nd Ice Hockey World Junior Championship. It is being hosted by the city of Buffalo, New York at the KeyBank Center and HarborCenter.