Question: who won the last season of food network star
[{'answer': 'Tregaye Fraser', 'provenance': [{'wikipedia_id': '50301306', 'title': 'Food Network Star (season 12)', 'start_paragraph_id': 6, 'start_character': 12, 'end_paragraph_id': 6, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Contestants.:Winner.\n'}]}]