Question: List all the writers of the comics which has Robert Bernstein as one of the writer ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/writers> <http://dbpedia.org/resource/Robert_Bernstein_(comics)> . ?x <http://dbpedia.org/property/writers> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Comic>}