Question: when did the gilded age begin and end
[{'answer': 'the 1870s to about 1900', 'provenance': [{'wikipedia_id': '485133', 'title': 'Gilded Age', 'start_paragraph_id': 1, 'start_character': 99, 'end_paragraph_id': 1, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'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': 12126797462787900218}, 'section': 'Section::::Abstract.'}]}]