<http://webisa.webdatacommons.org/287431837>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/287431837>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ucar.edu> .
<http://webisa.webdatacommons.org/prov/133848141>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/287431837> .
<http://webisa.webdatacommons.org/287431837>	<http://www.w3.org/ns/prov#value>	"The PDSI is calculated from precipitation, temperature, radiation, and other factors that influence soil moisture." .