Complex sentence: William Elvis Sloan I (1867--1961) invented the Flushometer flushing mechanism for toilets and urinals, which is installed in millions of commercial, institutional and industrial restrooms worldwide.
Split into simpler sentences: William Elvis Sloan I (1867--1961) invented the Flushometer flushing mechanism for toilets and urinals. It is installed in millions of commercial, institutional and industrial restrooms worldwide.