Complex sentence: The early 1930s saw intense competition in developing long-range flying boats for intercontinental passenger service, but the United Kingdom had no match for the new American Sikorsky S-42 flying boats, which were making headlines all over the world.
Split into simpler sentences: The early 1930s saw intense competition in developing long-range flying boats for intercontinental passenger service. The United Kingdom had no match for the new American Sikorsky S-42 flying boats, which were making headlines all over the world.