About: http://webisa.webdatacommons.org/90224562

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	Until 1840, North America had received an average of 20,000 immigrants per year, most coming from two places - the slaves came from Africa, from Europe came mostly English, Scottish and Irish.
http://www.w3.org/ns/prov#wasQuotedFrom	busuu.com