Question: when does season nine of the walking dead begin
[{'answer': 'October 7 , 2018', 'provenance': [{'wikipedia_id': '57893695', 'title': 'The Walking Dead (season 9)', 'start_paragraph_id': 106, 'start_character': 177, 'end_paragraph_id': 106, 'end_character': 193, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '57893695', 'title': 'The Walking Dead (season 9)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 540, 'bleu_score': 0.741988734730046, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3197841045819892378}, 'section': 'Section::::Abstract.'}]}]