Complex sentence: The Festival of the Bluegrass, Kentucky's oldest bluegrass music festival, is held the first full weekend in June; it includes three stages for music and a "bluegrass music camp" for school children.
Split into simpler sentences: The Festival of the Bluegrass, Kentucky's oldest bluegrass music festival, is the first full weekend in June. It includes three stages for music and a "music camp" that teaches the bluegrass music to school children.