<https://www.borntoengineer.com/the-astronomy-of-christmas-an-engineers-guide-to-the-winter-solstice#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.borntoengineer.com/the-astronomy-of-christmas-an-engineers-guide-to-the-winter-solstice>