Question: list the  software which works on both the OS  - Microsoft Windows and Mac OS ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/operatingSystem> <http://dbpedia.org/resource/Microsoft_Windows> . ?uri <http://dbpedia.org/ontology/operatingSystem> <http://dbpedia.org/resource/Mac_OS> . }