How many research papers has Dong-Hyun S. published?
Mention the number of papers that Dong-Hyun Seo has published.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/141/6557> }
<https://dblp.org/pid/141/6557>