Complex sentence: Along with Ed Robertson, he was a founding member, lead singer, guitarist, and a primary songwriter of the music group Barenaked Ladies (BNL); he left the band in 2009 to pursue a solo career.
Split into simpler sentences: Along with Ed Robertson, he was a founding member, lead singer, guitarist, and a primary songwriter of the music group Barenaked Ladies (BNL). He left the band in 2009 to pursue a solo career.