Question: who killed the riddle family in harry potter
[{'answer': 'Tom Marvolo Riddle', 'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'start_paragraph_id': 1, 'start_character': 37, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45106', 'title': 'Lord Voldemort', 'start_paragraph_id': 57, 'start_character': 0, 'end_paragraph_id': 57, 'end_character': 387, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2414966960499494111}, 'section': 'Section::::Family.:Riddle family.\n'}]}]