Complex sentence: The final tournament spot in the 2015--16 Rugby Champions Cup was decided by a playoff involving the Pro12's highest finishing team that is not already qualified, along with the seventh highest finishing clubs from France's Top 14 and the English Premiership.
Split into simpler sentences: The final tournament spot in the 2015--16 Rugby Champions Cup will be decided by a playoff. The playoff will involve the Pro12's highest finishing team that is not already qualified, along with the seventh highest finishing clubs from France's Top 14 and the English Premiership.