Question: where does the red in red velvet cake come from
[{'answer': 'red dye', 'provenance': [{'wikipedia_id': '1056445', 'title': 'Red velvet cake', 'start_paragraph_id': 1, 'start_character': 192, 'end_paragraph_id': 1, 'end_character': 199, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]