Didn't Jan K. and Aqib Javed not co-author a paper?
Was a paper not not co-authored by Jan K. and Aqib Javed?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/60/455> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/156/9389> }
<https://dblp.org/pid/60/455> <https://dblp.org/pid/156/9389>