Question: who was playing in las vegas when the shooting happened
[{'answer': 'country music singer Jason Aldean', 'provenance': [{'wikipedia_id': '55414735', 'title': '2017 Las Vegas shooting', 'start_paragraph_id': 16, 'start_character': 158, 'end_paragraph_id': 16, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Shooting.:Attack.\n'}]}, {'provenance': [{'wikipedia_id': '55414735', 'title': '2017 Las Vegas shooting', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 226, 'bleu_score': 0.794062335437227, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1487296309237804402}, 'section': 'Section::::Shooting.:Attack.\n'}]}]