Complex sentence: Following this debut, No Sinner went on a North American tour where they performed at the annual South by Southwest (SXSW) festival and the WXPN "Triple-A Non-Comm Convention".
Split into simpler sentences: Following this debut, No Sinner went on a North American tour. They performed at the annual South by Southwest (SXSW) festival and the WXPN "Triple-A Non-Comm Convention".