About: http://webisa.webdatacommons.org/5067345

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	However, there is a requirement for suppressing the use of Pb, which is used as one of the free cutting elements, in view of the earth environmental problem.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com