About: http://webisa.webdatacommons.org/216678657

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	There are also more than 100 specimens of building stones, with glass sands, the mixtures used for various kinds of glass, and the finished product.
http://www.w3.org/ns/prov#wasQuotedFrom	iit.edu