Question: Who is associated  with the musical artists from Africa '70 (band) and Tony Allen ?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/associatedMusicalArtist> <http://dbpedia.org/resource/Africa_'70_(band)> . ?uri <http://dbpedia.org/ontology/associatedMusicalArtist> <http://dbpedia.org/resource/Tony_Allen_(musician)> . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/MusicalArtist>}