<http://webisa.webdatacommons.org/221484612>	<http://www.w3.org/ns/prov#value>	"However, these methods suffer from the use of expensive starting materials such as borax." .
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<http://webisa.webdatacommons.org/221484612>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .