Didn't Y. Liu and Robert T. Collins not co-author a paper?
Was a paper not not co-authored by Y. Liu and Robert T. Collins?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/l/YanxiLiu> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/76/2806> }
<https://dblp.org/pid/l/YanxiLiu> <https://dblp.org/pid/76/2806>