About: http://webisa.webdatacommons.org/146237294

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	Located in the interior of the base and coaxially aligned with the head is a chamber having an interiorly facing partial spherical shaped surface.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com