About: http://webisa.webdatacommons.org/344884058

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	If some code does set Radius1 to a negative value, an exception will be thrown, but he is not the responsibility of your class.The other method is a notification to the class that the property has been changed.
http://www.w3.org/ns/prov#wasQuotedFrom	microsoft.com