<https://mydesignhomestudio.com/blog/tips-for-adding-a-second-story-or-extension-onto-your-house/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://mydesignhomestudio.com/blog/tips-for-adding-a-second-story-or-extension-onto-your-house/>