Was a paper not not co-authored by L. Yin and X.-M. Zhu?
Didn't L. Yin and Zhu, X.-M. not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/66/729> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/21/6775> }
<https://dblp.org/pid/66/729> <https://dblp.org/pid/21/6775>