Some labels missing in RDF

[johannessimon]

Some resources do not have any labels (e.g. foaf:name) assigned, though the information is available on MusicBrainz.

Example: resource with URI http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#_. MusicBrainz does have a name for it ("Angie", a song), however the exported work.nt contains only the following triples:

<http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#composition> <http://purl.org/ontology/mo/produced_work> <http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#_> .
<http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#_> <http://purl.org/ontology/mo/musicbrainz_guid> "201288d5-7e37-33df-852e-ee5bbc9cba71"^^<http://www.w3.org/2001/XMLSchema#string> .
<http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#_> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/mo/MusicalWork> .
<http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#composition> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/mo/Composition> .
<http://musicbrainz.org/work/201288d5-7e37-33df-852e-ee5bbc9cba71#_> <http://xmlns.com/foaf/0.1/isPrimaryTopicOf> <http://en.wikipedia.org/wiki/Angie_(song)> .

I am in fact using the SPARQL endpoint at http://linkedbrainz.org/sparql/, but could not find any labels in the exported RDF either. Is this information simply not available or is this a bug?

Thanks!