<https://walyou.com/blog/2010/02/19/electric-bike-concept-ver2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://walyou.com/blog/2010/02/19/electric-bike-concept-ver2/electric-bike-concept-ver2_03_65qtt_22976/>