Question: when was the national institute of health established
[{'answer': '1887', 'provenance': [{'wikipedia_id': '46174', 'title': 'National Institutes of Health', 'start_paragraph_id': 7, 'start_character': 3, 'end_paragraph_id': 7, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]