Question: Which series are Lennier and Londo Mollari both from?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Lennier> <http://dbpedia.org/ontology/series> ?uri. <http://dbpedia.org/resource/Londo_Mollari> <http://dbpedia.org/ontology/series> ?uri . }