Question: Who is the daughter of Bill Clinton married to?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string
WHERE 
{
        res:Bill_Clinton onto:child ?child .
        ?child prop:spouse ?string .
        ?uri rdfs:label ?string .
}