<http://webisa.webdatacommons.org/128563069>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/390705744>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/128563069> .
<http://webisa.webdatacommons.org/prov/485582183>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/128563069> .
<http://webisa.webdatacommons.org/128563069>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/128563069>	<http://www.w3.org/ns/prov#value>	"Metal powders, in particular aluminum and iron powders, have been difficult to sinter into porous structures due to the oxidation of the metals into their more highly oxidized states." .