About: http://webisa.webdatacommons.org/136180224

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	Yes, there is a free version of Unity, and Unity is supposed to be nice to work with, but if you want shadows you have to pay \\$1500 dollars.
http://www.w3.org/ns/prov#wasQuotedFrom	devmaster.net