<http://webisa.webdatacommons.org/58133708>	<http://www.w3.org/ns/prov#value>	"Like all glass and some other types of naturally occurring rocks, obsidian breaks with a characteristic conchoidal fracture." .
<http://webisa.webdatacommons.org/58133708>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wikipedia.org> .
<http://webisa.webdatacommons.org/prov/197369643>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/58133708> .
<http://webisa.webdatacommons.org/58133708>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .