Question: when did ford switch from f100 to f150
[{'answer': '1983', 'provenance': [{'wikipedia_id': '895409', 'title': 'Ford F-Series', 'start_paragraph_id': 28, 'start_character': 448, 'end_paragraph_id': 28, 'end_character': 452, 'bleu_score': 1.0, 'section': 'Section::::Seventh generation (1980–1986).\n'}]}]