Question: when was the first diesel engine put in a truck
[{'answer': '1923', 'provenance': [{'wikipedia_id': '8540', 'title': 'Diesel engine', 'start_paragraph_id': 64, 'start_character': 12, 'end_paragraph_id': 64, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::History.:Timeline.:1920s.\n'}]}]