About: http://webisa.webdatacommons.org/452230631

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	They are books of high quality, to be sure, but high-quality Sudoku are easy to have a computer churn out, and anyone can put out a book of them (many have, including me).
http://www.w3.org/ns/prov#wasQuotedFrom	prospect.org