From how many works is the musical derived, whose lyrics are written by Sheldon Harnick?
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/lyrics> <http://dbpedia.org/resource/Sheldon_Harnick> . ?x <http://dbpedia.org/ontology/basedOn> ?uri  . }
Sheldon_Harnick