List the papers published by Duane F. Marble in the last 4 years.
Which papers did Marble, Duane F. publish in the last four years?
SELECT DISTINCT ?answer WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/61/3613> . ?answer <https://dblp.org/rdf/schema#yearOfPublication> ?y FILTER(?y > YEAR(NOW())-4) }
<https://dblp.org/pid/61/3613>