About: http://webisa.webdatacommons.org/52699400

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 underground retorts can be horizontal or vertical, and of various shapes such as rectangular, cylindrical, elongated, or irregular. Retorting fluid can be passed into such retort in any direction such as upward, downward, sideways or
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com