an Entity references as follows:
Evgeni Alexandrovich Koroliov (Russian: Евге́ний Алекса́ндрович Королёв; born 1 October 1949, in Moscow) is a Russian classical pianist. Koroliov studied at the Moscow Conservatory. Since 1978 he has been a teacher at the Hochschule für Musik und Theater Hamburg. He lives in Hamburg with his wife Ljupka Hadzigeorgieva. Together they also form a musical duo („Duo Koroliov“).