What is the average number of research papers published by the author Constantinos S. per year?
Report the average number of publications by Constantinos S. per year.
SELECT (AVG(?count) AS ?answer) { SELECT (COUNT(?y) AS ?count) WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/117/0557> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?y } GROUP BY ?y }
<https://dblp.org/pid/117/0557>