Complex sentence: In 1979 they broke Elvis Presley's attendance record at The Sahara Tahoe in Lake Tahoe, Nevada and the group went on to undergo several personnel changes and split up in 1986.
Split into simpler sentences: In 1979 they broke Elvis Presley's attendance record at The Sahara Tahoe in Lake Tahoe, Nevada. The group underwent several personnel changes and split up in 1986.