Complex sentence: As Tchukon's co-composer, lead vocalist, and keyboardist, Slim helped propel the band to national heights as they won the CBC's Rock Wars talent competition in 1985, then U.S competition Star Search in 1986.
Split into simpler sentences: As Tchukon's co-composer, lead vocalist, and keyboardist, Slim helped propel the band to national heights. They won the CBC's Rock Wars talent competition in 1985, then the U.S competition Star Search in 1986.