About: http://webisa.webdatacommons.org/135879825

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 inner side of a closed polygonal contour of the shading film BM shown in FIG. 1 is an opening in which the shading film BM is not formed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com