<https://kids-osaka.com/blog/3433/attachment/13837a43-0162-465b-9456-021acce801ee/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://kids-osaka.com/blog/3433/attachment/13837a43-0162-465b-9456-021acce801ee/>