Which author published the paper on Network coding and has the name Guangjun?
Name the author who published the paper on Network coding and has the name Liu.
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/itiis/Liu15> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/journals/itiis/Liu15>