Complex sentence: It contains a complete performance recorded live at the Shrine Auditorium in Los Angeles, California on August 24,1968, the event was left unreleased for nearly 25 years, before being remastered and released on Grateful Dead Records in 1992.
Split into simpler sentences: It contains a complete performance recorded live at the Shrine Auditorium in Los Angeles, California on August 24,1968. The event was left unreleased for nearly 25 years, before being remastered and released on Grateful Dead Records in 1992.