Question: when did ford come out with the 6.7
[{'answer': '2010', 'provenance': [{'wikipedia_id': '1008769', 'title': 'Ford Power Stroke engine', 'start_paragraph_id': 2, 'start_character': 174, 'end_paragraph_id': 2, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1008769', 'title': 'Ford Power Stroke engine', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 477, 'bleu_score': 0.8958217065845671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9473278381620912763}, 'section': 'Section::::Abstract.'}]}]