<https://www.dmu.edu/blog/2016/08/murray-r-berkowitz-d-o-96-m-m-s-m-p-h/#schema-webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.dmu.edu/blog/2016/08/murray-r-berkowitz-d-o-96-m-m-s-m-p-h/>