Question: Which writers had influenced the philosopher that refused a Nobel Prize?
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?uri 
WHERE {
        ?x rdf:type dbo:Philosopher .
        ?x text:"refuse" text:"Nobel Prize" .
        ?x dbo:influencedBy ?uri .
        ?uri rdf:type dbo:Writer .
}