Complex sentence: Prior to 2014, Austria's best result of the 21st century was sixth, achieved by Alf Poier in, until the 2014 Eurovision Song Contest in Copenhagen where Austria achieved its second victory in the contest, with Conchita Wurst placing first with 290 points.
Split into simpler sentences: Prior to 2014, Austria's best result of the 21st century was sixth, achieved by Alf Poier in. At the 2014 Eurovision Song Contest in Copenhagen, Austria won its second victory in the contest, when Conchita Wurst placed first with 290 points.