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<http://webisa.webdatacommons.org/prov/294561068>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/123290292> .
<http://webisa.webdatacommons.org/123290292>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<berkeley.edu> .
<http://webisa.webdatacommons.org/123290292>	<http://www.w3.org/ns/prov#value>	"soft mattress can be made from a hard material such as steel, by" .