About: http://webisa.webdatacommons.org/455755308

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	For example, for magnesium catalysts, including magnesium ferrite, the catalysts will preferably have from 75 to 97 weight percent iron based on the total weight of iron and magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca