<https://forum.the-big-bang-theory.com/topic/628-episode-319-april-12/page/2/#comment-7424>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.the-big-bang-theory.com/topic/628-episode-319-april-12/page/2/#comment-7426>