Complex sentence: Benno was a member of The Asylum Choir with Leon Russell in the late 1960s, and launched a solo career in the early 1970s, with his 1972 effort "Ambush" being the most commercially successful.
Split into simpler sentences: Benno was a member of the Asylum Choir with Leon Russell in the late 1960s. He launched a solo career in the early 1970s, with the 1972 album "Ambush" being his most commercially successful.