Question: who are the ghosts in lord of the rings
[{'answer': 'Dead Men of Dunharrow', 'provenance': [{'wikipedia_id': '485721', 'title': 'Dead Men of Dunharrow', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '485721', 'title': 'Dead Men of Dunharrow', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 497, 'bleu_score': 0.9009607481831341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2026186800450399547}, 'section': 'Section::::Abstract.'}]}]