About: http://webisa.webdatacommons.org/339274132

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	Similarly, when abrasive elements 54 are formed from a metal or metal alloy, such as iron or an iron-containing material, chemicals, such as hydrochloric acid, that etch through these materials may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com