Question: the author of the book david copperfield is
[{'answer': 'Charles Dickens', 'provenance': [{'wikipedia_id': '63110', 'title': 'David Copperfield', 'start_paragraph_id': 1, 'start_character': 41, 'end_paragraph_id': 1, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]