Question: Give me all libraries established earlier than 1400.
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/>PREFIX dbp: <http://dbpedia.org/property/>PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>SELECT DISTINCT ?uriWHERE { ?uri rdf:type dbo:Library . ?uri dbp:established ?year . FILTER (?year < 140)}