About: http://webisa.webdatacommons.org/446240045

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	Wait... $49 gets me a 'lifetime' subscription; but the 'textbook' is arranged around a 'class', with a professor and other students, which is presumably going to last a relatively short period of time.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org