Didn't Phillip Shvartsman and Xinmiao Zhang not co-author a paper?
Was a paper not not co-authored by Phillip Shvartsman and Xinmiao Z.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/244/7559> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/80/3657> }
<https://dblp.org/pid/244/7559> <https://dblp.org/pid/80/3657>