Question: what is the latest series of wheeler dealers
[{'answer': '15', 'provenance': [{'wikipedia_id': '42831209', 'title': 'List of Wheeler Dealers episodes', 'start_paragraph_id': 14, 'start_character': 24, 'end_paragraph_id': 14, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Episodes.:Series 8 (2011).\n'}]}]