About: http://webisa.webdatacommons.org/142640647

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	It was not until the opening of the revolution that any honest effort was made to suppress the trade, except in Pennsylvania, where bills to abolish the slave trade were passed in 1712, 1714 and 1717, and vetoed.
http://www.w3.org/ns/prov#wasQuotedFrom	econlib.org