Question: when did the dixiecrats leave the democratic party
[{'answer': '1948', 'provenance': [{'wikipedia_id': '158006', 'title': 'Dixiecrat', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]