Question: who has a ring of power in lotr
[{'answer': 'Sauron', 'provenance': [{'wikipedia_id': '23141343', 'title': 'Sauron', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23141343', 'title': 'Sauron', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16762629250382364857}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23141343', 'title': 'Sauron', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 553, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16762629250382364857}, 'section': 'Section::::Biography.:Second Age.:The Rings of Power.\n'}]}, {'provenance': [{'wikipedia_id': '27472888', 'title': 'The Fellowship of the Ring', 'section': 'Section::::Plot summary.:Book I: The Ring Sets Out.\n', 'start_paragraph_id': 11, 'end_paragraph_id': 11, 'meta': {'evidence_span': ['it is the One Ring of Sauron the "Dark Lord". He proves this by flinging the Ring into the fireplace, the heat of which causes the Ring to display Elf-writing in the language of Mordor. Sauron had forged the Ring to subdue and rule Middle-earth, but in the War of the Last Alliance', 'Over the next seventeen years, Gandalf periodically pays short visits to Bag End. One spring night, he arrives to enlighten Frodo about Bilbo\'s ring; it is the One Ring of Sauron the "Dark Lord". He proves this by flinging the Ring into the fireplace, the heat of which causes the Ring to display Elf-writing in the language of Mordor. Sauron had forged the Ring to subdue and rule Middle-earth, but in the War of the Last Alliance, he had been defeated by Gil-galad the Elven King and Elendil, High King of Arnor and Gondor, though they themselves perished in the deed', 'One spring night, he arrives to enlighten Frodo about Bilbo\'s ring; it is the One Ring of Sauron the "Dark Lord". He proves this by flinging the Ring into the fireplace, the heat of which causes the Ring to display Elf-writing in the language of Mordor. Sauron had forged the Ring to subdue and rule Middle-earth, but in the War of the Last Alliance, he had been defeated by Gil-galad the Elven King and Elendil, High King of Arnor and Gondor, though they themselves perished in the deed.']}}]}]