Didn't Ioanna Chouvarda and Carvalho, Paulo not co-author a paper?
Was a paper not not co-authored by Chouvarda, Ioanna and Paulo Carvalho?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/33/1080> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/52/5239-1> }
<https://dblp.org/pid/33/1080> <https://dblp.org/pid/52/5239-1>