Complex sentence: It chronicles the events in their lives since they started working together nearly 40 years ago, picking up where their first autobiographical album, "Captain Fantastic and the Brown Dirt Cowboy" (1975), left off.
Split into simpler sentences: It chronicles the events in their lives since they started working together nearly 40 years ago. The album basically takes off from where their first autobiographical album "Captain Fantastic And The Brown Dirt Cowboy" in 1975 left off.