Music and the Web of Linked Data - ISMIR 2009 Tutorial

We can find all artists who list their country as 'Hungary' and list their musical genre as 'Rap' using the following query. Note we want to use the SELECT ?variable FROM <http://dbtune.org/myspace/> to specify we are interested in this particular graph in the endpoint.

PREFIX mysp:<http://purl.org/ontology/myspace#>
PREFIX foaf:<http://xmlns.com/foaf/0.1/>
PREFIX mo:<http://purl.org/ontology/mo/>

SELECT ?name ?friends 
FROM <http://dbtune.org/myspace/>
WHERE {?artist foaf:based_near <http://sws.geonames.org/719819/> ;
a mo:MusicArtist ;
foaf:name ?name ;
mysp:totalFriends ?friends ;
mysp:genreTag <http://purl.org/ontology/myspace#Hip%20Hop> .
}
ORDER BY DESC (?friends)