<https://thelookgoodfeelgoodstore.ca/blog/what-is-the-average-depth-of-a-swim-spa>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://thelookgoodfeelgoodstore.ca/blog/what-is-the-average-depth-of-a-swim-spa/>