Complex sentence: TDE was originally three members, Fatal on vocals, Reverend Ryk on bass and Robert Lockerbee on Guitar, however after a year, that line-up changed to Killjo Zapata on Guitar, Oren Karpovsky on Bass, and Matt Callonna on drums.
Split into simpler sentences: TDE was originally three members, Fatal on vocals, Reverend Ryk on bass and Robert Lockerbee on Guitar. After the exiting of Robert and Ryk, Fatal continued the band with Killjo Zapata on Guitar, Oren Karpovsky on Bass, and Matt Callonna on drums.