Question: who has won the 2017 formula 1 australian grand pix tournament
Answer: Sebastian Vettel

title: 2017 Australian Grand Prix
text: Grand Prix Circuit. The reigning World Champion Nico Rosberg was the winner of the 2016 race, but he did not defend his win as he retired from the sport after the 2016 season. Mercedes driver Lewis Hamilton started the race from pole, matching Ayrton Senna's record of six pole positions in Australia. Sebastian Vettel won the race, which was his and Ferrari's first win since the 2015 Singapore Grand Prix. Hamilton finished second, with Valtteri Bottas completing the podium in third on his début for Mercedes. The race was also Ferrari's first win at the track since the 2007 edition.