Question: Which U.S. state has the highest population density?
SPARQL query:
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?uri 
WHERE {
        ?uri rdf:type yago:StatesOfTheUnitedStates .
        ?uri prop:densityrank ?rank .
} 
ORDER BY ASC(?rank) 
OFFSET 0 LIMIT 1