Question: when does the regular season start for nhl
[{'answer': 'October 4 , 2017', 'provenance': [{'wikipedia_id': '37516850', 'title': '2017–18 NHL season', 'start_paragraph_id': 36, 'start_character': 28, 'end_paragraph_id': 36, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Regular season.\n'}]}, {'provenance': [{'wikipedia_id': '37516850', 'title': '2017–18 NHL season', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 455, 'bleu_score': 0.575635475766844, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14022552408529980653}, 'section': 'Section::::Abstract.'}]}]