Complex sentence: The building, which was completed in 1928, is an example of neo-gothic and art deco architecture designed by Edward Buehler Delk and financed by renowned oilman and dedicated philanthropist Waite Phillips (1883--1964).
Split into simpler sentences: The building, which was completed in 1928, is an example of neo-gothic and art deco architecture. It was designed by Edward Buehler Delk and financed by renowned oilman and dedicated philanthropist Waite Phillips (1883--1964).