<http://webisa.webdatacommons.org/prov/253591089>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/54201049> .
<http://webisa.webdatacommons.org/54201049>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/54201049>	<http://www.w3.org/ns/prov#value>	"In some animals such as crustaceans, the shell may be a combination of this substance and keratin." .
<http://webisa.webdatacommons.org/54201049>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wisegeek.com> .