About: http://webisa.webdatacommons.org/341810574

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	Osmium is a relatively heavy element compared to others disclosed herein, and it has been found that about 0.5 weight percent osmium provides sufficient radiopacity enhancement.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au