Didn't William L. Kocay and Emiliano Dall'Anese not co-author a paper?
Was a paper not not co-authored by William L. Kocay and Emiliano Dall'Anese?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/k/WilliamKocay> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/45/7883> }
<https://dblp.org/pid/k/WilliamKocay> <https://dblp.org/pid/45/7883>