<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://citymaps.com/m/explore-historic-places-in-petergof/VenueMap>
<https://citymaps.com/m/explore-historic-places-in-petergof/eedec448-0baa-4035-835c-e610bdac49b2>