Question: How many owners are there of lines starting at the South Station?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/routeStart> <http://dbpedia.org/resource/South_Station> . ?x <http://dbpedia.org/property/owner> ?uri  . }
Answer: There are [14] owners of lines starting at the South Station .