With which author does Patrick Juola has the most papers and how many?
Report the most frequent co-author of P. Juola and how many papers do they have together?
SELECT (GROUP_CONCAT(?answer; separator=', ') AS ?answer) ?count WHERE { SELECT DISTINCT ?answer (COUNT(?answer) AS ?count) WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/47/1348> . ?x <https://dblp.org/rdf/schema#authoredBy> ?answer FILTER(?answer != <https://dblp.org/pid/47/1348>)} GROUP BY ?answer } ORDER BY DESC(?count) LIMIT 1
<https://dblp.org/pid/47/1348>