When was the first paper by Olav N. \u00D8sterb\u00F8 published?
Find the year in which \u00D8sterb\u00F8, O. N. published their first paper.
SELECT DISTINCT MIN(xsd:integer(?answer)) AS ?answer WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/33/2163> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/pid/33/2163>