Complex sentence: Noades then took over Wimbledon, who were elected to the Football League in 1977 and won promotion from the Fourth Division in their second season as a Football League club, although they were relegated after just one season.
Split into simpler sentences: Noades then took over Wimbledon, who were elected to the Football League in 1977. They won promotion from the Fourth Division in only their second season as a Football League club, although they were relegated after just one season.