Complex sentence: The 7s team reached 3 consecutive national finals between 1997-1999 winning 2 and losing the' 99 final against Stonyhurst; they lost the 2008 final 19-0 by Sedbergh School.
Split into simpler sentences: The 7s team reached 3 consecutive national finals between 1997-1999 winning 2 and losing the' 99 final against Stonyhurst. They also lost the 2008 final; being whitewashed 19-0 by Sedbergh School.