About: http://webisa.webdatacommons.org/35586232

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	At one time, mainly in the 1970s and 1980s, the cost of trading options was quite high.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com