About: http://webisa.webdatacommons.org/196086448

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	The singleton pattern (in mathematics, a singleton is a set with exactly one element) has been invented for class-based languages to help them implement components.
http://www.w3.org/ns/prov#wasQuotedFrom	2ality.com