<http://webisa.webdatacommons.org/prov/195439299>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/147697958> .
<http://webisa.webdatacommons.org/147697958>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<uc.edu> .
<http://webisa.webdatacommons.org/147697958>	<http://www.w3.org/ns/prov#value>	"There is really no way to tell for sure that a person is using any drug, including crack, simply by observing the person." .
<http://webisa.webdatacommons.org/147697958>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .