Count the number of co-authors that Mezei, J\u00F3zsef has.
How many co-authors does Mezei, J\u00F3zsef have?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/28/7651> . ?x <https://dblp.org/rdf/schema#authoredBy> ?answer FILTER(?answer != <https://dblp.org/pid/28/7651>) }
<https://dblp.org/pid/28/7651>