<http://webisa.webdatacommons.org/prov/352401926>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/7445819> .
<http://webisa.webdatacommons.org/7445819>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<alibaba.com> .
<http://webisa.webdatacommons.org/7445819>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/7445819>	<http://www.w3.org/ns/prov#value>	"A waveguide is a structure which guides waves, such as electromagnetic waves or sound waves." .