<https://forum.aquariumcoop.com/topic/33042-stem-plant-particularly-staurogyne-repens-clarification/#comment-314167>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.aquariumcoop.com/topic/33042-stem-plant-particularly-staurogyne-repens-clarification/>