Complex sentence: Jean Robert Borotra (13 August 1898--17 July 1994) was a French champion tennis player, one of the famous "Four Musketeers" from his country who dominated tennis in the late 1920s and early 1930s.
Split into simpler sentences: Jean Robert Borotra (13 August 1898--17 July 1994) was a French champion tennis player. He was one of the famous "Four Musketeers" from his country who dominated tennis in the late 1920s and early 1930s.