Question: when did meals on wheels start in america
[{'answer': '1974', 'provenance': [{'wikipedia_id': '1739803', 'title': 'Meals on Wheels', 'start_paragraph_id': 29, 'start_character': 15, 'end_paragraph_id': 29, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::History.:United States (1954).\n'}]}, {'provenance': [{'wikipedia_id': '1739803', 'title': 'Meals on Wheels', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 618, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4910224358784027241}, 'section': 'Section::::History.:United States (1954).\n'}]}]