Question: Who developed the programming languages designed by Rob Pike?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:designer <http://dbpedia.org/resource/Rob_Pike> . ?x onto:developer ?uri  . ?x rdf:type onto:ProgrammingLanguage}