Question: where did the name gilded age come from
[{'answer': "Mark Twain 's 1873 novel"}, {'provenance': [{'wikipedia_id': '485133', 'title': 'Gilded Age', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 650, 'bleu_score': 0.8823084657258701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13616728514986549315}, 'section': 'Section::::Abstract.'}]}]