About: http://webisa.webdatacommons.org/173449367

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	The grooves each have a bottom surface and side surfaces in a shape in which a plane including the bottom surface is perpendicular to planes including the side surfaces.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org