Question: when was the longest recorded recession in us economic history
[{'answer': '1929 until 1941', 'provenance': [{'wikipedia_id': '523033', 'title': 'List of recessions in the United States', 'start_paragraph_id': 4, 'start_character': 594, 'end_paragraph_id': 4, 'end_character': 609, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '523033', 'title': 'List of recessions in the United States', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 680, 'bleu_score': 0.9618830282233141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1587410074187020251}, 'section': 'Section::::Abstract.'}]}]