Question: where did the phrase american dream come from
[{'answer': 'the mystique regarding frontier life', 'provenance': [{'wikipedia_id': '373930', 'title': 'American Dream', 'start_paragraph_id': 4, 'start_character': 217, 'end_paragraph_id': 4, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '373930', 'title': 'American Dream', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 524, 'bleu_score': 0.977139080690077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1644056258917097264}, 'section': 'Section::::History.\n'}]}]