Question: when did mega millions go to 70 numbers
[{'answer': 'October 28 , 2017', 'provenance': [{'wikipedia_id': '378462', 'title': 'Mega Millions', 'start_paragraph_id': 77, 'start_character': 442, 'end_paragraph_id': 77, 'end_character': 465, 'bleu_score': 1.0, 'section': 'Section::::History.:October 2017 format/price point change.:"Just the Jackpot" option.\n'}]}, {'provenance': [{'wikipedia_id': '378462', 'title': 'Mega Millions', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 584, 'bleu_score': 0.875059439120146, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9165991728231581558}, 'section': 'Section::::History.:October 2017 format/price point change.\n'}]}]