About: http://webisa.webdatacommons.org/291516113

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	Your example does not really work because you can not say a line is a point, and therefore it fails the Liskov Substitution Principle and inheritance is not appropriate.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com