About: http://webisa.webdatacommons.org/27730728

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	Other sources of oxygen are the water from boric acid, ambient atmosphere, and metal oxides, e.g. iron oxide in the contained molten metal.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com