Was a paper not not co-authored by Y. Zhu and Wang, Y.?
Didn't Y. Zhu and Yonghua Wang not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/99/962> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/74/3287-1> }
<https://dblp.org/pid/99/962> <https://dblp.org/pid/74/3287-1>