Complex sentence: Jack Nicklaus won the second of his six Masters titles with a score of 271 (− 17), at the time a tournament record, three strokes better than Ben Hogan's 274 in 1953.
Split into simpler sentences: Jack Nicklaus won his second Masters title with a score of 271 (− 17). At the time it was a tournament record, three strokes better than Ben Hogan's 274 in 1953.