List the papers published by Bjarne Stig Andersen in the last four years.
Which papers did Bjarne Stig Andersen publish in the last 4 years?
SELECT DISTINCT ?answer WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/55/2433> . ?answer <https://dblp.org/rdf/schema#yearOfPublication> ?y FILTER(?y > YEAR(NOW())-4) }
<https://dblp.org/pid/55/2433>