Question: Which programming languages were influenced by Perl?
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
SELECT DISTINCT ?uri
WHERE { 
        ?uri rdf:type dbo:ProgrammingLanguage .
      { ?uri dbo:influencedBy res:Perl . }
      UNION
      { res:Perl dbo:influenced ?uri . }
}