Didn't Kay Kender and Katta Spiel not co-author a paper?
Was a paper not not co-authored by Kay Kender and Katta Spiel?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/277/3079> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/151/3248> }
<https://dblp.org/pid/277/3079> <https://dblp.org/pid/151/3248>