an Entity references as follows:
Montserrat Caballé / Rossini, Bellini, Verdi, Cilea... [et al]; Opera de la RCA Italiana, London Philharm. Orch.; Cillario, dir; New Philharm. Orch.; Guadagno, dir; Symph. Orch. de Barcelone... [et al]; Masini, dir... [et al]