#First count how many triples are there PREFIX aocat: PREFIX ariadneplus: SELECT * WHERE { GRAPH { ?resource aocat:has_temporal_coverage ?temporal . } GRAPH { ?temporal aocat:has_period ?period . optional {?temporal aocat:from ?temporalFrom .} optional {?temporal aocat:until ?temporalUntil .} } } #let's delete them from the periodoplus graph PREFIX aocat: WITH DELETE { ?temporal aocat:has_period ?periodOURI . ?temporal aocat:from ?temporalFrom . ?temporal aocat:until ?temporalUntil . } USING USING WHERE { ?resource aocat:has_temporal_coverage ?temporal . ?temporal aocat:has_period ?periodOURI . optional {?temporal aocat:from ?temporalFrom .} optional {?temporal aocat:until ?temporalUntil .} }