<http://webisa.webdatacommons.org/prov/230822929>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/448973100> .
<http://webisa.webdatacommons.org/448973100>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<cornell.edu> .
<http://webisa.webdatacommons.org/448973100>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/227421702>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/448973100> .
<http://webisa.webdatacommons.org/448973100>	<http://www.w3.org/ns/prov#value>	"annual and perennial grasses, mustards, and others, are a problem throughout" .