Complex sentence: In 1973 a IOR 3/4 ton 32ft prototype by the British Naval Architects Holman and Pye called "Unidentified Flying Object" was built for Richard Mathews, which won the Royal Yacht Squadron's de Mass Cup at Cowes in 1974 and many other races.
Split into simpler sentences: In 1973 a IOR 3/4 ton 32ft prototype designed by the British Naval Architects Holman and Pye called "Unidentified Flying Object" was built for Richard Mathews. This yacht won the Royal Yacht Squadron's de Mass Cup at Cowes in 1974 and many other races.