Question: What is the name of the bassist, one of the founding members of the Seattle based American Rock band Soundgarden, who left the band in 1989 and started an independent rock band Truly together?
Sentence (from "Soundgarden"): Soundgarden is an American rock band formed in Seattle, Washington, in 1984 by singer and rhythm guitarist Chris Cornell, lead guitarist Kim Thayil, and bassist Hiro Yamamoto.
Relevant evidence: Yes