Question: who is the killer on the girl on the train
[{'answer': 'Tom', 'provenance': [{'wikipedia_id': '46461040', 'title': 'The Girl on the Train (novel)', 'start_paragraph_id': 6, 'start_character': 82, 'end_paragraph_id': 6, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '46461040', 'title': 'The Girl on the Train (novel)', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 888, 'bleu_score': 0.9645479622923241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1135453538777614948}, 'section': 'Section::::Plot.\n'}]}]