Question: who started meals on wheels in the usa
[{'answer': 'Margaret Moffat Toy', 'provenance': [{'wikipedia_id': '1739803', 'title': 'Meals on Wheels', 'start_paragraph_id': 16, 'start_character': 239, 'end_paragraph_id': 16, 'end_character': 258, 'bleu_score': 1.0, 'section': 'Section::::History.:United States (1954).\n'}]}, {'provenance': [{'wikipedia_id': '1739803', 'title': 'Meals on Wheels', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 1024, 'bleu_score': 0.9878413801697931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11475314546368687148}, 'section': 'Section::::History.:United States (1954).\n'}]}]