<http://webisa.webdatacommons.org/159849367>	<http://www.w3.org/ns/prov#value>	"These processes require chelating agents and positively-charged small pore filters, and suffer clogging and interference from anionic pigments, blood and other substances which may be present in urine." .
<http://webisa.webdatacommons.org/159849367>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.ca> .
<http://webisa.webdatacommons.org/159849367>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/336868721>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/159849367> .