Complex sentence: By the time of the third Pearls Before Swine album in 1969, the other original members of the group had left, but Rapp retained the group name for recordings-at this time, Pearls Before Swine did not exist as a performing band.
Split into simpler sentences: By the time of the third Pearls Before Swine album in 1969, the other original members of the group had left, but Rapp retained the group name for recordings. At this time, Pearls Before Swine did not exist as a performing band.