 PREFIX wfdesc: <http://purl.org/wf4ever/wfdesc#> 
 PREFIX rdfs:    <http://www.w3.org/2000/01/rdf-schema#> 
 PREFIX motifs:  <http://purl.org/wf4ever/motifs.owl#>
 SELECT ?opA ?outA 
 WHERE {
        ?opA a wfdesc:Process .
        ?opA wfdesc:hasOutput ?outA .
	FILTER (NOT EXISTS { ?link wfdesc:hasSource ?outA } && NOT EXISTS { ?opA a wfdesc:Workflow})
 }