Question: who was the killer in then there were none
[{'answer': 'Emily Brent', 'provenance': [{'wikipedia_id': '4302172', 'title': 'Agatha Christie: And Then There Were None', 'start_paragraph_id': 12, 'start_character': 149, 'end_paragraph_id': 12, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Synopsis.:Setting and characters.\n'}]}, {'provenance': [{'wikipedia_id': '4302172', 'title': 'Agatha Christie: And Then There Were None', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 389, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17051816913965663334}, 'section': 'Section::::Synopsis.:Plot.\n'}]}]