<http://webisa.webdatacommons.org/243939135>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ck12.org> .
<http://webisa.webdatacommons.org/prov/184409285>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/243939135> .
<http://webisa.webdatacommons.org/243939135>	<http://www.w3.org/ns/prov#value>	"Basically, four types of materials may vibrate." .
<http://webisa.webdatacommons.org/243939135>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .