About: http://webisa.webdatacommons.org/198694239

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	Labor unions date back to colonial times, and by the 1790s labor unions, composed of shoemakers, coopers, printers, shipwrights, carpenters and other skilled crafts, existed in the major port cities of the emerging nation.
http://www.w3.org/ns/prov#wasQuotedFrom	prairiefirenewspaper.com