Question: How heavy is Jupiter's lightest moon?
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
SELECT DISTINCT ?n
WHERE {
        ?uri dbp:satelliteOf res:Jupiter .
        ?uri dbo:mass ?n .
}
ORDER BY ASC(?n)
OFFSET 0 LIMIT 1