Didn't Sotiris Batsakis and Ilias Tachmazidis not co-author a paper?
Was a paper not not co-authored by Batsakis, S. and Tachmazidis, I.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/70/7127> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/116/9321> }
<https://dblp.org/pid/70/7127> <https://dblp.org/pid/116/9321>