Didn't Clemens A. Otto and Lou, Y. not co-author a paper?
Was a paper not not co-authored by Clemens A. Otto and Lou, Y.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/226/3571> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/199/5547> }
<https://dblp.org/pid/226/3571> <https://dblp.org/pid/199/5547>