<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/SearchAction>
<https://store.kobobooks.com/en-us/ebook/propagating-insight-a-tribute-to-the-works-of-yngve-ohrn-a-tribute-to-the-works-of-yngve-ohrn>