Complex sentence: Robert Pershing Doerr (born April 7 1918 in Los Angeles, California) is a former second baseman on Major League Baseball who played his entire fourteen-year career with the Boston Red Sox.
Split into simpler sentences: Robert Pershing Doerr (born April 7,1918 in Los Angeles, California) is a former Major League Baseball player. A second baseman, Doerr played his entire fourteen-year career with the Boston Red Sox.