Question: who was the doctor who used maggot debridement therapy in world war i
[{'answer': 'William S. Baer', 'provenance': [{'wikipedia_id': '2683920', 'title': 'Maggot therapy', 'start_paragraph_id': 31, 'start_character': 20, 'end_paragraph_id': 31, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2683920', 'title': 'Maggot therapy', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 443, 'bleu_score': 0.943193616899856, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3470940548595018117}, 'section': 'Section::::History.\n'}]}]