Report the year in which Ma, Yanjun published their last paper.
In which year was the last paper by Ma, Yanjun published?
SELECT DISTINCT MAX(xsd:integer(?answer)) AS ?answer WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/79/2225> . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/pid/79/2225>