Question: when did the aluminum f 150 come out
[{'answer': '2015 model year', 'provenance': [{'wikipedia_id': '895409', 'title': 'Ford F-Series', 'start_paragraph_id': 59, 'start_character': 63, 'end_paragraph_id': 59, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Thirteenth generation (2015–present).\n'}]}, {'provenance': [{'wikipedia_id': '895409', 'title': 'Ford F-Series', 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 1032, 'bleu_score': 0.94639902147812, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10961808763964659150}, 'section': 'Section::::Thirteenth generation (2015–present).\n'}]}]