Question: when did the us have the highest unemployment rate
[{'answer': 'the Great Depression', 'provenance': [{'wikipedia_id': '28688759', 'title': 'Unemployment in the United States', 'start_paragraph_id': 32, 'start_character': 310, 'end_paragraph_id': 32, 'end_character': 330, 'bleu_score': 1.0, 'section': 'Section::::U.S. employment history.\n'}]}, {'provenance': [{'wikipedia_id': '28688759', 'title': 'Unemployment in the United States', 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 984, 'bleu_score': 0.9875383322810981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12517308801546523532}, 'section': 'Section::::U.S. employment history.\n'}]}]