Question: who came up with the law of conservation of mass
[{'answer': 'Antoine Lavoisier', 'provenance': [{'wikipedia_id': '145040', 'title': 'Conservation of mass', 'start_paragraph_id': 3, 'start_character': 245, 'end_paragraph_id': 3, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '145040', 'title': 'Conservation of mass', 'start_paragraph_id': 3, 'start_character': 4, 'end_paragraph_id': 3, 'end_character': 414, 'bleu_score': 0.7045917613408791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3050588271340931916}, 'section': 'Section::::Abstract.'}]}]