About: http://webisa.webdatacommons.org/411118780

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	Usual and common shapes like circle, rectangle as well as least known words like quatrefoil, arbelos are taught in the program.There is a test your knowledge game as well.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com