Complex sentence: On May 18,2007 there was an incident when the visiting Canadian Forces aerial demonstration squadron, the "Snowbirds", while practicing a lapbelt failed in one of the aircraft, resulting in a mishap that killed the pilot of Snowbird 2.
Split into simpler sentences: On May 18,2007 there was an incident when the visiting Canadian Forces aerial demonstration squadron, the "Snowbirds". While practicing, a lap belt failed in one of the aircraft, resulting in a mishap that killed the pilot of Snowbird 2.