PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX ecrm: <http://erlangen-crm.org/current/>
SELECT ?name1 ?name2 {
    ?trainer dbo:training ?trainee .
  ?person1 owl:sameAs ?trainer ;
  a ecrm:E39_Actor ;
   ecrm:P131_is_identified_by ?id1 .
  ?id1 ecrm:P3_has_note ?name1 .
    ?person2 owl:sameAs ?trainee ;
  a ecrm:E39_Actor ;
   ecrm:P131_is_identified_by ?id2 .
  ?id2 ecrm:P3_has_note ?name2 .
}