Question: when was the first children's hospital built
[{'answer': '1741', 'provenance': [{'wikipedia_id': '968332', 'title': "Children's hospital", 'start_paragraph_id': 6, 'start_character': 837, 'end_paragraph_id': 6, 'end_character': 841, 'bleu_score': 1.0, 'section': 'Section::::History.:Early Voluntary Care.\n'}]}, {'provenance': [{'wikipedia_id': '968332', 'title': "Children's hospital", 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 2246, 'bleu_score': 0.9943581947811181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4974652639763004458}, 'section': 'Section::::History.:Early Voluntary Care.\n'}]}]