<http://webisa.webdatacommons.org/128051552>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/128051552>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gwu.edu> .
<http://webisa.webdatacommons.org/128051552>	<http://www.w3.org/ns/prov#value>	"Problems such as opaque structures occluding each other and difficulty of perceiving depth of a given pixel complicates these kinds of volume visualizations." .
<http://webisa.webdatacommons.org/prov/26725033>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/128051552> .