Question: List the uni. having affiliation with Graham Holding Company and have a campus in Iowa ?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/affiliations> <http://dbpedia.org/resource/Graham_Holdings_Company> . ?uri <http://dbpedia.org/ontology/campus> <http://dbpedia.org/resource/Iowa>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/University>}