Question: What software is developed by GNOWSYS and is licensed by Frontaccounting?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Frontaccounting> <http://dbpedia.org/ontology/license> ?uri. <http://dbpedia.org/resource/GNOWSYS> <http://dbpedia.org/ontology/developer> ?uri}