Question: when did sweet leave in the heat of the night
[{'answer': 'Season 7', 'provenance': [{'wikipedia_id': '98510', 'title': 'In the Heat of the Night (TV series)', 'start_paragraph_id': 46, 'start_character': 301, 'end_paragraph_id': 46, 'end_character': 309, 'bleu_score': 1.0, 'section': 'Section::::Season-by-season overview.:Fifth season, 1991-92.\n'}]}]