Mention the number of papers that Zhang, Jianzhong has published.
How many research papers has Jianzhong Zhang published?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/78/6091-2> }
<https://dblp.org/pid/78/6091-2>