<https://blog.listenwise.com/2018/04/heres-what-we-did-in-march/img_0023/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.listenwise.com/2018/04/heres-what-we-did-in-march/img_0023/>