Question: What company involved in the development of Sherlock did Arthur Levinson work for?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Arthur_D._Levinson> onto:occupation ?uri. <http://dbpedia.org/resource/Sherlock_(software)> onto:developer ?uri}