About: http://webisa.webdatacommons.org/285032754

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	My thought was if the world you are building on is an instance, then it should be fairly straight forward to instance planets in a solar system, or solar systems in galaxies.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.de