Question: who has won the 2018 formula 1 australian grand pix tournament
[{'answer': 'Sebastian Vettel', 'provenance': [{'wikipedia_id': '53775900', 'title': '2018 Australian Grand Prix', 'start_paragraph_id': 2, 'start_character': 15, 'end_paragraph_id': 2, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]