About: http://webisa.webdatacommons.org/207116088

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	For simplicity in the drawings no showing is made of ledges, grooves, raised surfaces, or other formations on the tops and bottoms
http://www.w3.org/ns/prov#wasQuotedFrom	google.es