About: http://webisa.webdatacommons.org/137577520

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	Our challenges range from level I to III, and an additional level X for mystery challenges (they may have been unsolved for a long time, mostly we do not know their solution or have no idea whether there is a solution at all).
http://www.w3.org/ns/prov#wasQuotedFrom	mysterytwisterc3.org