Question: What is the company that has products with Windows RT as its OS?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/os> <http://dbpedia.org/resource/Windows_RT> . ?uri <http://dbpedia.org/ontology/product> ?x  . }
Answer: The company that has products with Windows RT as its OS are [Microsoft, Microsoft Store].