Complex sentence: Cecil Redvers Griffiths (January 20,1901--July 29,1945) was a British athlete, winner of gold medal in 4x400 m relay at the 1920 Summer Olympics.
Split into simpler sentences: Cecil Redvers Griffiths (January 20,1901--July 29,1945) was a British athlete. Cecil Griffiths was a winner of the Olympic Gold medal in 4 x 400m relay at the 1920 Summer Olympics.