Question: where did the expression who dat come from
[{'answer': 'New Orleans', 'provenance': [{'wikipedia_id': '8587040', 'title': 'Who Dat?', 'start_paragraph_id': 2, 'start_character': 106, 'end_paragraph_id': 2, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'a common dialogue element between the performers and crowd at traveling minstrel shows in the region .'}]