Didn't Khaled S. and Naim B. not co-author a paper?
Was a paper not not co-authored by Khaled S. and Naim B.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/47/1159> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/94/2344> }
<https://dblp.org/pid/47/1159> <https://dblp.org/pid/94/2344>