Question: when did the ambulance service start in the uk
[{'answer': '1946', 'provenance': [{'wikipedia_id': '9581377', 'title': 'Emergency medical services in the United Kingdom', 'start_paragraph_id': 14, 'start_character': 32, 'end_paragraph_id': 14, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '9581377', 'title': 'Emergency medical services in the United Kingdom', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 1021, 'bleu_score': 0.9874601949752461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 856049228676356255}, 'section': 'Section::::History.\n'}]}]