Question: when did the first baby formula come out
[{'answer': '1867', 'provenance': [{'wikipedia_id': '65330', 'title': 'Infant formula', 'start_paragraph_id': 101, 'start_character': 902, 'end_paragraph_id': 101, 'end_character': 906, 'bleu_score': 1.0, 'section': 'Section::::History.:Early infant foods.\n'}]}, {'provenance': [{'wikipedia_id': '65330', 'title': 'Infant formula', 'start_paragraph_id': 101, 'start_character': 444, 'end_paragraph_id': 101, 'end_character': 1143, 'bleu_score': 0.9828310228624961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14763498418493247547}, 'section': 'Section::::History.:Early infant foods.\n'}]}]