<http://webisa.webdatacommons.org/280218818>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/492646115>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/280218818> .
<http://webisa.webdatacommons.org/280218818>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<usda.gov> .
<http://webisa.webdatacommons.org/prov/168823595>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/280218818> .
<http://webisa.webdatacommons.org/280218818>	<http://www.w3.org/ns/prov#value>	"expensive, is often necessary for wheat, barley, corn and other crops to" .