About: http://webisa.webdatacommons.org/345302440

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	It should be understood from the description hereinabove, that once the values of x and y are defined, the values of z are predetermined because there is a unique value of z corresponding to each x and y pair as illustrated by Step 490.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com