Complex sentence: John Edward Smith (3 September 1914--1989), commonly known as Ted Smith, was an English full back who represented Millwall F.C. in the late 1930s, and then coached Benfica from 1948 to 1952 guiding Benfica to their first international trophy.
Split into simpler sentences: John Edward Smith (3 September 1914--1989), commonly known as Ted Smith, was an English full back. Smith represented Millwall F.C. in the late 1930s, he then coached Benfica from 1948 to 1952 guiding them to their first international trophy.