About: http://webisa.webdatacommons.org/138853315

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	As an example, information has long been available from a NASDAQ ???Level 2??? data feed to professionals such as stock brokers and professional traders.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com