<http://webisa.webdatacommons.org/394520773>	<http://www.w3.org/ns/prov#value>	"Head lettuce is the most important salad vegetable grown in the United States." .
<http://webisa.webdatacommons.org/394520773>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/316971280>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/394520773> .
<http://webisa.webdatacommons.org/394520773>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ncsu.edu> .