Complex sentence: England are the first and to date the only team from the northern hemisphere to win the Rugby World Cup when they won the tournament back in 2003 and were also runners-up in 1991 and 2007.
Split into simpler sentences: England are the first, and to date the only, team from the northern hemisphere to win the Rugby World Cup, when they won the tournament back in 2003. They were also runners-up in 1991 and 2007.