Question: What is the label of the singles whose group is Outlawz ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/musicalArtist> <http://dbpedia.org/resource/Outlawz> . ?x <http://dbpedia.org/property/label> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Single>}