SELECT DISTINCT
	po.project,
	po.contactperson,
	po.startdate,
	po.enddate,
	po.inferred,
	po.deletedbyinference,
	po.trust,
	po.inferenceprovenance,
	'contactperson@@@contactperson@@@dnet:project_organization_relations@@@dnet:project_organization_relations' AS semantics

FROM project_organization po
	LEFT OUTER JOIN persons p ON (p.id = po.contactperson)

WHERE po.contactperson IS NOT NULL AND (p.firstname IS NOT NULL OR p.secondnames IS NOT NULL)
