Question: who is the author of the book nineteen eighty four
[{'answer': 'George Orwell', 'provenance': [{'wikipedia_id': '23454753', 'title': 'Nineteen Eighty-Four', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]