Question: who is known as the father of epidemiology
[{'answer': 'John Snow', 'provenance': [{'wikipedia_id': '66997', 'title': 'Epidemiology', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::History.:Modern era.\n'}]}, {'provenance': [{'wikipedia_id': '66997', 'title': 'Epidemiology', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 833, 'bleu_score': 0.9855586187885531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6336049293612741894}, 'section': 'Section::::History.:Modern era.\n'}]}]