Question: Which Harris County based company is a subsidiary of Tandem Computers?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/locationCity> <http://dbpedia.org/resource/Harris_County,_Texas> . ?uri <http://dbpedia.org/ontology/subsidiary> <http://dbpedia.org/resource/Tandem_Computers>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Company>}