In which year did the author Artem Polyvyanyy publish the least publications?
Least number of papers were published by A. Polyvyanyy in which year?
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/17/4121> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer } GROUP BY ?answer } ORDER BY ASC(?count) LIMIT 1
<https://dblp.org/pid/17/4121>