Question: what was the last year jeep liberty was made
[{'answer': '2012', 'provenance': [{'wikipedia_id': '1162430', 'title': 'Jeep Liberty', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 139, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]