Question: who won the premier league of darts 2017
[{'answer': 'Michael van Gerwen', 'provenance': [{'wikipedia_id': '51437247', 'title': '2017 Premier League Darts', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51437247', 'title': '2017 Premier League Darts', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 236, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1962000873723889220}, 'section': 'Section::::Abstract.'}]}]