Mention the year in which Costa, Ant\u00F4nio Carlos da Rocha published the most papers.
In which year did the author Costa, Ant\u00F4nio Carlos da Rocha publish the most research papers?
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/36/5618> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer } GROUP BY ?answer } ORDER BY DESC(?count) LIMIT 1
<https://dblp.org/pid/36/5618>