About: http://webisa.webdatacommons.org/269313596

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	A number of newer specialties have become foci of societies and journals, mostly dating from the late 1950s to the present.
http://www.w3.org/ns/prov#wasQuotedFrom	thecanadianencyclopedia.com