Question: when did the first food pyramid come out
[{'answer': '1974', 'provenance': [{'wikipedia_id': '208092', 'title': 'Food pyramid (nutrition)', 'start_paragraph_id': 1, 'start_character': 201, 'end_paragraph_id': 1, 'end_character': 205, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '208092', 'title': 'Food pyramid (nutrition)', 'start_paragraph_id': 1, 'start_character': 18, 'end_paragraph_id': 1, 'end_character': 436, 'bleu_score': 0.890515786245569, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6940802303772617858}, 'section': 'Section::::Abstract.'}]}]