Question: What is the second highest mountain on Earth?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string WHERE 
{
	?uri rdf:type onto:Mountain .
	?uri onto:elevation ?elevation .
        OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}
ORDER BY DESC(?elevation) OFFSET 1 LIMIT 1