About: http://webisa.webdatacommons.org/41730205

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	An ad exchange is a marketplace in which publishers and advertisers can participate in an auction-based system for buying and selling online display advertising from a large group of participating sites.
http://www.w3.org/ns/prov#wasQuotedFrom	clickz.com