Question: during the 1920s the united states economy move through which phase of the business cycle
[{'answer': 'bubble', 'provenance': [{'wikipedia_id': '139993', 'title': 'Economic bubble', 'start_paragraph_id': 0, 'start_character': 9, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '139993', 'title': 'Economic bubble', 'start_paragraph_id': 94, 'start_character': 0, 'end_paragraph_id': 94, 'end_character': 52, 'bleu_score': 0.51697315395717, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11129242222111886628}, 'section': 'Section::::Examples of asset bubbles.\n'}]}]