<http://webisa.webdatacommons.org/prov/450256626>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/22911609> .
<http://webisa.webdatacommons.org/22911609>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/22911609>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/22911609>	<http://www.w3.org/ns/prov#value>	"hCG and .beta.-hCG can also be purified, or preferably partially purified, from any source known to contain hCG or .beta.-hCG, e.g., urine from pregnant women, using conventional techniques well-known in the art, such as affinity chromatography." .