<http://webisa.webdatacommons.org/28053927>	<http://www.w3.org/ns/prov#value>	"A plain sand or fine gravel on its own is the best substrate." .
<http://webisa.webdatacommons.org/28053927>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<tropicalfishkeeping.com> .
<http://webisa.webdatacommons.org/prov/421273417>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/28053927> .
<http://webisa.webdatacommons.org/28053927>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .