About: http://webisa.webdatacommons.org/177909772

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	charles sereno June 30, 2012 at 11:17 am Ptolemy may have been wrong, but the argument that Copernicus and Kepler simplified things is a stretch.
http://www.w3.org/ns/prov#wasQuotedFrom	mathbabe.org