About: http://webisa.webdatacommons.org/111597276

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 noted by ETFdb.com, SPY is set up as a unit investment trust, which must replicate its index and thus has limits such as prohibiting lending out underlying shares to other firms.
http://www.w3.org/ns/prov#wasQuotedFrom	marketwatch.com