Complex sentence: It was the debut of the sudden-death format at the Masters, adopted in 1976, and started on the tenth hole, a downhill par-4 where all three players missed birdie putts and parred.
Split into simpler sentences: It was the debut of the sudden-death format at the Masters, which was adopted in 1976. It started on the tenth hole, a downhill par-4 where all three players missed birdie putts and parred.