Complex sentence: Earl St. John (14th June 1892-26th February 1968) was an American film producer in overall charge of production for The Rank Organisation at Pinewood Studios from 1950 to 1964.
Split into simpler sentences: Earl St. John (14th June 1892-26th February 1968) was an American film producer. He was in overall charge of production for The Rank Organisation at Pinewood Studios from 1950 to 1964.