Was a paper not not co-authored by Kamal Al-Haddad and Bruno Francois?
Didn't Al-Haddad, Kamal and B. Francois not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/05/1965> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/85/8036> }
<https://dblp.org/pid/05/1965> <https://dblp.org/pid/85/8036>