Question: when did the bmw 1 series have a facelift
[{'answer': '2011', 'provenance': [{'wikipedia_id': '26428463', 'title': 'BMW 1 Series', 'start_paragraph_id': 5, 'start_character': 51, 'end_paragraph_id': 5, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26428463', 'title': 'BMW 1 Series', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 80, 'bleu_score': 0.8781879837907131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11877024190271034337}, 'section': 'Section::::Second Generation (F20/F21; 2011–2019).\n'}]}]