Question: who played the truck driver in the movie duel
[{'answer': 'Carey Loftin', 'provenance': [{'wikipedia_id': '250571', 'title': 'Duel (1971 film)', 'start_paragraph_id': 46, 'start_character': 637, 'end_paragraph_id': 46, 'end_character': 649, 'bleu_score': 1.0, 'section': 'Section::::Production.:Music.\n'}]}]