Report the year in which Regan L. Mandryk published the least papers.
In which year did Mandryk, Regan L. publish the least papers and how many?
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/40/5931> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer } GROUP BY ?answer } ORDER BY ASC(?count) LIMIT 1
<https://dblp.org/pid/40/5931>