About: http://webisa.webdatacommons.org/162444393

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	Yes, printing from a file is easier but if they are worried about pirated copies...And yeah, constantly updating books is a big requirement for a limited number of subjects.
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com