Question: who discovered the vaccine for the prevention of small pox
[{'answer': 'Edward Jenner', 'provenance': [{'wikipedia_id': '61088', 'title': 'Smallpox vaccine', 'start_paragraph_id': 1, 'start_character': 82, 'end_paragraph_id': 1, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '61088', 'title': 'Smallpox vaccine', 'start_paragraph_id': 50, 'start_character': 0, 'end_paragraph_id': 50, 'end_character': 620, 'bleu_score': 0.6688283163174621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2044344451748837864}, 'section': 'Section::::History.:Terminology.\n'}]}]