About: http://webisa.webdatacommons.org/440885356

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 Twin Towers were composed of steel, which is mostly iron, mixed with cement, which is somewhat similar to hardened clay.
http://www.w3.org/ns/prov#wasQuotedFrom	greatdreams.com