<http://webisa.webdatacommons.org/402241456>	<http://www.w3.org/ns/prov#value>	"By 1990, with knowledge from his mechanical engineering curriculum, he was already deep into such technologies as GPS. After a 15-year Navy career, Christopherson returned in 2003 to his family farm near Clarkfield, Minn." .
<http://webisa.webdatacommons.org/402241456>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/402241456>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<agweb.com> .
<http://webisa.webdatacommons.org/prov/239139103>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/402241456> .