About: http://webisa.webdatacommons.org/48716484

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	MLK Day was first observed as a federal holiday in 1986 but a number of states, particularly in the South and West, did not add it to their list of state holidays until some years later.
http://www.w3.org/ns/prov#wasQuotedFrom	iberkshires.com