ASK WHERE { <http://dbpedia.org/resource/Nokia_Lumia_830> <http://dbpedia.org/property/os> <http://dbpedia.org/resource/Windows_Phone_8.1> }
Is WP 8.1 the OS on Lumia 830?
ASK WHERE { resource:Nokia_Lumia_830 property:os resource:Windows_Phone_8.1 }
Yes
[Yes], Windows Phone 8.1 is the OS of Nokia Lumia 830.
[Yes}, Windows Phone 8.1 is the Nokia Luxury 830's operating system.