<https://suncruisermedia.com/Home/tech/how-to-keep-safety-chains-from-dragging-with-the-chain-up/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://suncruisermedia.com/Home/tech/how-to-keep-safety-chains-from-dragging-with-the-chain-up/>