SELECT DISTINCT COUNT(?uri) WHERE {?uri <http://dbpedia.org/ontology/operatingSystem> <http://dbpedia.org/resource/Mac_OS> . }
Mac OS is the operating system of how many things?
SELECT DISTINCT COUNT ( ?o ) WHERE { ?o property:operating_system resource:Mac_O_S . }
170
There are [170] softwares whose operating system is Mac OS.
There are [170] programs whose operating system is Mac OS.
There are [170] software are there whose operating system is Mac OS.
[170] programs are there with operating system Mac OS.