<http://webisa.webdatacommons.org/230740399>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.fr> .
<http://webisa.webdatacommons.org/230740399>	<http://www.w3.org/ns/prov#value>	"The microspheres are formed by heating the alkali metal silicate at a temperature in the range of 1000-2500??? F. in the presence of a gasifying agent, such as urea or Na2CO3." .
<http://webisa.webdatacommons.org/prov/89919609>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/230740399> .
<http://webisa.webdatacommons.org/230740399>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .