<http://webisa.webdatacommons.org/prov/50947214>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/134448459> .
<http://webisa.webdatacommons.org/134448459>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/134448459>	<http://www.w3.org/ns/prov#value>	"Material appears mainly as large rock fragments, boulders." .
<http://webisa.webdatacommons.org/134448459>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<bgs.ac.uk> .