How many co-authors does Yusu Wang have?
Count the number of co-authors that Yusu Wang has.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/28/5745> . ?x <https://dblp.org/rdf/schema#authoredBy> ?answer FILTER(?answer != <https://dblp.org/pid/28/5745>) }
<https://dblp.org/pid/28/5745>