Question: How many writers speak a language belonging to the Germanic kind of languages?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/languageFamily> <http://dbpedia.org/resource/Germanic_languages> . ?uri <http://dbpedia.org/property/language> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Writer>}