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<http://webisa.webdatacommons.org/132894116>	<http://www.w3.org/ns/prov#value>	"However, the process of cast moulding severely limits the kinds of structures that can be made with the material." .
<http://webisa.webdatacommons.org/prov/316430402>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/132894116> .