About: http://webisa.webdatacommons.org/417400846

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	And while K-12 textbooks are now written at a simpler level, periodicals, journal articles, and other reading materials have become more complex.
http://www.w3.org/ns/prov#wasQuotedFrom	questia.com