Complex sentence: He was a major contributer in helping the Lakers clinch the Western Conference Finals against the Kevin Garnett and the Minnesota Timberwolves, when he scored 18 points in the sixth and final match, all from 3-point range, where was was 6 for 7.
Split into simpler sentences: He was a major contributer in helping the Lakers clinch the Western Conference Finals against the Kevin Garnett led Timberwolves. He had 18 points, all from 3-point range, where was was 6 for 7.