In which year was the first paper by Yang Ji published?
Find the year in which Ji, Yang published their first paper.
SELECT DISTINCT MIN(xsd:integer(?answer)) AS ?answer WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/72/1056> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/pid/72/1056>