Complex sentence: Truly was a band formed in the wake of the grunge era, featuring, former Soundgarden bassist Hiro Yamamoto, one-time Screaming Trees drummer Mark Pickerel and singer Robert Roth.
Split into simpler sentences: Truly was an American rock band formed in the wake of the grunge era. It featured former Soundgarden bassist Hiro Yamamoto, one-time Screaming Trees drummer Mark Pickerel, and singer Robert Roth.