About: http://webisa.webdatacommons.org/170411977

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 gradient is a normal vector to a plane given a point in $xyz$-plane.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com