Question: when did the vegas golden knights become a team
[{'answer': 'March 1 , 2017', 'provenance': [{'wikipedia_id': '47712000', 'title': 'Vegas Golden Knights', 'start_paragraph_id': 9, 'start_character': 3, 'end_paragraph_id': 9, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::History.:Start of operations: 2017–present.\n'}]}, {'provenance': [{'wikipedia_id': '47712000', 'title': 'Vegas Golden Knights', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 366, 'bleu_score': 0.923768200931469, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6374779516290750672}, 'section': 'Section::::History.:Start of operations: 2017–present.\n'}]}]