Report the year in which Xu, B. published their last paper.
When was the last paper by Xu, B. published?
SELECT DISTINCT MAX(xsd:integer(?answer)) AS ?answer WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/26/1194> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/pid/26/1194>