Question: who was the killer in the book and then there were none
[{'answer': 'Justice Wargrave', 'provenance': [{'wikipedia_id': '18949410', 'title': 'And Then There Were None', 'start_paragraph_id': 7, 'start_character': 62, 'end_paragraph_id': 7, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Plot summary.\n'}]}, {'provenance': [{'wikipedia_id': '18949410', 'title': 'And Then There Were None', 'start_paragraph_id': 15, 'start_character': 457, 'end_paragraph_id': 15, 'end_character': 1115, 'bleu_score': 0.509772533257797, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16591541960617817341}, 'section': 'Section::::Plot summary.\n'}]}]