About: http://webisa.webdatacommons.org/211620532

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	This is when the math becomes incorrent and does not make any sense, except in one case: when plane-ground == 0.
http://www.w3.org/ns/prov#wasQuotedFrom	kottke.org