About: http://webisa.webdatacommons.org/269139341

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	On the other hand, what happens here is an exchange between Cartesian coordinates for $\mathbb{R}^2$ and polar coordinates.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com