About: http://webisa.webdatacommons.org/292416518

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	In this context, concave is used in the sense of having concavity in a longitudinal cross section through the cavity, such as seen in FIGS. 3 and 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.de