Complex sentence: In its original form, the album was purported to contain the last half of a performance at the Michigan Palace in Detroit, on February 9,1974, the band's final live performance until their reformation in 2003, almost thirty years later.
Split into simpler sentences: In its original form, the album contained the last half of a performance at the Michigan Palace in Detroit, on February 9,1974. It was the band's final live performance until their reformation in 2003, almost thirty years later.