Question: when do the live shows start on agt
[{'answer': 'August 14 , 2018', 'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 31, 'start_character': 88, 'end_paragraph_id': 31, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Quarterfinals.\n'}]}, {'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 71, 'bleu_score': 0.8385766789076251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9323113077885443782}, 'section': 'Section::::Abstract.'}]}]