Complex sentence: Hansen achieved his best finish ever at a World Golf Championship event in March 2011, when he finished tied 3rd at the WGC-Cadillac Championship, three strokes behind winner Nick Watney.
Split into simpler sentences: Hansen achieved his best finish ever at a World Golf Championship Event in March 2011. He finished tied 3rd at the WGC-Cadillac Championship, three strokes behind winner Nick Watney.