DELETE WHERE { ?x ?y ?z }
PREFIX app: <http://www.mws.cz/render.owl#>
PREFIX fit: <http://www.fit.vutbr.cz/#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
CONSTRUCT { ?s ?p ?o }
WHERE { ?s ?p ?o .
?s rdf:type app:Launch .
?s app:LaunchDatetime "20141117221436"^^<http://www.w3.org/2001/XMLSchema#string>
}