Question: when did the vice president stop being elected
[{'answer': '1804', 'provenance': [{'wikipedia_id': '32759', 'title': 'Vice President of the United States', 'start_paragraph_id': 10, 'start_character': 849, 'end_paragraph_id': 10, 'end_character': 853, 'bleu_score': 1.0, 'section': 'Section::::Origin.\n'}]}, {'provenance': [{'wikipedia_id': '32759', 'title': 'Vice President of the United States', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 862, 'bleu_score': 0.9846731957240711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9464268720977766796}, 'section': 'Section::::Origin.\n'}]}]