Complex sentence: Jules Rimet (14 October 1873--16 October 1956) was president of the French Football Federation from 1919 to 1946 and of FIFA from 1921 to 1954, making him FIFA's longest serving president, having served for 33 years.
Split into simpler sentences: Jules Rimet (14 October 1873--16 October 1956) was president of the French Football Federation from 1919 to 1946 and of FIFA from 1921 to 1954. He is currently FIFA's longest serving president, having served for 33 years.