Question: who was the chemist who discovered microorganisms could be destroyed by heating
[{'answer': 'Louis Pasteur', 'provenance': [{'wikipedia_id': '23311', 'title': 'Pasteurization', 'start_paragraph_id': 2, 'start_character': 49, 'end_paragraph_id': 2, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]