About: http://webisa.webdatacommons.org/417238537

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	As referred to herein, the term ???shale??? will be understood to mean materials such as certain types of clays (e.g., bentonite) and related subterranean materials that may ???swell,??? or increase in volume, when exposed to water.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com