About: http://webisa.webdatacommons.org/47671538

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	Cement is a powder made of a variety of materials (usually certain types of clay and limestone).
http://www.w3.org/ns/prov#wasQuotedFrom	teachengineering.org