Question: where did the 80 20 rule come from
[{'answer': 'Management consultant Joseph M. Juran', 'provenance': [{'wikipedia_id': '24562', 'title': 'Pareto principle', 'start_paragraph_id': 1, 'start_character': 201, 'end_paragraph_id': 1, 'end_character': 238, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24562', 'title': 'Pareto principle', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 554, 'bleu_score': 0.705965561831404, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8008580766403531573}, 'section': 'Section::::Abstract.'}]}]