Complex sentence: Although no team has ever won three straight Super Bowls, two teams have won three Lombardi trophies in four years: the Dallas Cowboys (1992,1993,1995) and the New England Patriots (2001,2003,2004).
Split into simpler sentences: Although no team has ever won three straight Super Bowls, two teams have won three Lombardi trophies in four years. They are the Dallas Cowboys (1992,1993,1995) and the New England Patriots (2001,2003,2004).