About: http://webisa.webdatacommons.org/447520264

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	Numerous sources: Following eMarketer tradition, we also analyzed hundreds of datapoints from some 30 research firms and other organizations that track ad spending on TV, the internet, newspapers, magazines, radio and directories.
http://www.w3.org/ns/prov#wasQuotedFrom	mktsci.com