Question: SPC XL is a statistical add-in for Microsoft Excel, SPC XL provides statistical analysis including Control chart, Process capability, Histogram, and Pareto chart, a chart that contains both bars and a line graph, where individual values are represented in descending order by bars, and the cumulative total is represented by the line, named after who?
{'answer': 'Vilfredo Pareto', 'supporting_facts': [['SPC XL', 2], ['Pareto chart', 0]]}