<https://www.aquaticplantcentral.com/threads/im-sick-of-my-constantly-cloudy-water.56683/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.aquaticplantcentral.com/threads/im-sick-of-my-constantly-cloudy-water.56683/#post-425383>