Cannot find concepts matched with any property

[natuk]

I can look for local concepts which have been matched to Getty AAT concepts with this query:

SELECT DISTINCT ?bodc ?aatc ?aatclf WHERE {
{
  ?bodc a skos:Concept .
  ?bodc skos:exactMatch ?aatc .
}
SERVICE <http://vocab.getty.edu/sparql> {
  ?aatc a gvp:Concept .
  ?aatc xl:prefLabel ?aatcl .
  ?aatcl xl:literalForm ?aatclf .
  FILTER (lang(?aatclf) = "en")
}
} LIMIT 10

But when I tried to look for any type of match between local concept and AAT concepts, the query returns no results:

SELECT DISTINCT ?bodc ?aatc ?aatclf WHERE {
{
  ?bodc a skos:Concept .
  ?bodc ?p ?aatc .
  ?p rdfs:subPropertyOf* skos:mappingRelation 
}
SERVICE <http://vocab.getty.edu/sparql> {
  ?aatc a gvp:Concept .
  ?aatc xl:prefLabel ?aatcl .
  ?aatcl xl:literalForm ?aatclf .
  FILTER (lang(?aatclf) = "en")
}
} LIMIT 10

What do I do wrong?

[natuk]

The SKOS rdfs was not loaded. This is sorted now.