About: http://webisa.webdatacommons.org/218853780

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	The S&P 500 is an index, not an exchange (its constituents include stocks traded on both the NYSE and NASDAQ exchanges).
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com