About: http://webisa.webdatacommons.org/55417088

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 culling (which includes the editorial work), printing and marketing result mainly in a book that costs 15-20 cents/page ($100 text book with 500 pages).
http://www.w3.org/ns/prov#wasQuotedFrom	thevalve.org