Question: when did the not in this lifetime tour start
[{'answer': 'April 8 , 2016', 'provenance': [{'wikipedia_id': '50015289', 'title': 'Not in This Lifetime... Tour', 'start_paragraph_id': 47, 'start_character': 3, 'end_paragraph_id': 47, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Concert broadcast and recordings.\n'}]}, {'answer': 'April 1 , 2016'}, {'provenance': [{'wikipedia_id': '50015289', 'title': 'Not in This Lifetime... Tour', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 1163, 'bleu_score': 0.9903144846642211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1307907986377726799}, 'section': 'Section::::Overview.:Notable events.\n'}]}, {'provenance': [{'wikipedia_id': '50015289', 'title': 'Not in This Lifetime... Tour', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 131, 'bleu_score': 0.8942255541978501}]}]