Question: who helps frodo and his friends escape from the barrow-wight
[{'answer': 'Tom Bombadil', 'provenance': [{'wikipedia_id': '27472888', 'title': 'The Fellowship of the Ring', 'start_paragraph_id': 15, 'start_character': 199, 'end_paragraph_id': 15, 'end_character': 211, 'bleu_score': 1.0, 'section': 'Section::::Plot summary.:Book I: The Ring Sets Out.\n'}]}, {'provenance': [{'wikipedia_id': '27472888', 'title': 'The Fellowship of the Ring', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 808, 'bleu_score': 0.9872197907830691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5278619575112832688}, 'section': 'Section::::Plot summary.:Book I: The Ring Sets Out.\n'}]}]