Complex sentence: Dr. Harold Frank Hoar (13 September, 1907--3 October 1976), was a British architect, artist, academic and architectural historian who designed the first terminal building at London's Gatwick Airport in the 1930s, at the age of twenty-five.
Split into simpler sentences: Dr. Harold Frank Hoar (13 September, 1907--3 October 1976), was a British architect, artist, academic and architectural historian. Hoar designed the first terminal building at London's Gatwick Airport in the 1930s, at the age of twenty-five.