Question: who discovered penicillin and how did he make the discovery
[{'answer': 'Sir Alexander Fleming', 'provenance': [{'wikipedia_id': '1937', 'title': 'Alexander Fleming', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1937', 'title': 'Alexander Fleming', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 487, 'bleu_score': 0.8409251525507251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16948362229117761713}, 'section': 'Section::::Abstract.'}]}]