About: http://webisa.webdatacommons.org/121221501

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	By the medieval period, before the invention of the telescope, some believed that the Moon was a perfectly smooth sphere.
http://www.w3.org/ns/prov#wasQuotedFrom	fixedreference.org