Complex sentence: In June of 2007, the TNT Series "Heartland" debuted with Kari playing the role of Kate Armstrong, and in November 2007, Matchett appeared on the American television program "ER", playing a new attending physician, Skye Wexler.
Split into simpler sentences: In June of 2007, the TNT Series "Heartland" debuted with Kari playing the role of Kate Armstrong. In November 2007, Matchett appeared on the American television program "ER", playing a new attending physician, Skye Wexler.