About: http://webisa.webdatacommons.org/235952560

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	Calculating these positions exactly is a complicated business, but there are approximate formulas that are usually good enough.
http://www.w3.org/ns/prov#wasQuotedFrom	physicspages.com