premise: The 2015 J&T Banka Prague Open was a professional tennis tournaments played on outdoor clay courts. It was the 6th edition of the tournament which was an International tournament on the 2015 WTA Tour. It took place at the Sparta Prague Tennis Club in Prague, Czech Republic, from 27 April to 2 May 2015. This was the event's first edition as a WTA International tournament.
hypothesis: A tennis player won the tournament
reason: It had to be won by a tennis player