<https://expertifie.com/courses/data_science_beginner_to_advanced-2/lesson/data-processing-and-data-wrangling-ppt-code-2/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://expertifie.com/courses/sample-course/lesson/data-processing-and-data-wrangling-ppt-code-2/>