Mention the papers published by Raofen W. and in which year.
Which papers did author Raofen Wang publish and in which year?
SELECT DISTINCT ?firstanswer ?secondanswer WHERE { ?firstanswer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/117/4504> . ?firstanswer <https://dblp.org/rdf/schema#yearOfPublication> ?secondanswer }
<https://dblp.org/pid/117/4504>