Question: when did ford stop using the 7.3-liter diesel
[{'answer': '2003', 'provenance': [{'wikipedia_id': '1008769', 'title': 'Ford Power Stroke engine', 'start_paragraph_id': 6, 'start_character': 480, 'end_paragraph_id': 6, 'end_character': 484, 'bleu_score': 1.0, 'section': 'Section::::7.3 Power Stroke.\n'}]}, {'provenance': [{'wikipedia_id': '1008769', 'title': 'Ford Power Stroke engine', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 257, 'bleu_score': 0.7433135701477781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12519096380397341148}, 'section': 'Section::::7.3 Power Stroke.:Common issues.\n'}]}]