Complex sentence: David Clarkson (born March 31,1984) is a former Canadian ice hockey forward, who is currently under contract with the Vegas Golden Knights of the National Hockey League (NHL) and is the head coach for the Upper Arlington Golden Bears ice hockey team.
Split into simpler sentences: David Clarkson (born March 31,1984) is a Canadian professional ice hockey coach and former player. He is currently under contract with the Vegas Golden Knights of the National Hockey League (NHL) and is the head coach for the Upper Arlington Golden Bears ice hockey team.