Question: who is considered to be the most influential writer of all time on medical subjects
[{'answer': 'Aelius Galenus or Claudius Galenus', 'provenance': [{'wikipedia_id': '12326', 'title': 'Galen', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12326', 'title': 'Galen', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 439, 'bleu_score': 0.7482445076940021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8413191776884335329}, 'section': 'Section::::Abstract.'}]}]