Was a paper not not co-authored by Marc Van Droogenbroeck and Anthony Cioppa?
Didn't Marc Van Droogenbroeck and A. Cioppa not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/83/4730> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/222/2684> }
<https://dblp.org/pid/83/4730> <https://dblp.org/pid/222/2684>