Question: when did indentured servitude end in the us
[{'answer': '1917', 'provenance': [{'wikipedia_id': '46187810', 'title': 'Indentured servitude in the Americas', 'start_paragraph_id': 3, 'start_character': 1086, 'end_paragraph_id': 3, 'end_character': 1090, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46187810', 'title': 'Indentured servitude in the Americas', 'start_paragraph_id': 52, 'start_character': 0, 'end_paragraph_id': 52, 'end_character': 170, 'bleu_score': 0.9321022168949711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17226602918989337979}, 'section': 'Section::::North America.:Decline.\n'}]}]