About: http://webisa.webdatacommons.org/237099733

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	Essentially, if you start at the rook and follow the row, column or diagonal until there are no more squares on that ray, there shouldn???t be any pieces other than the rook and target.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com