About: http://webisa.webdatacommons.org/228527811

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	that there are around 63 execution venues in the US markets, including 13 exchanges
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com