an Entity references as follows:
Violin concerto / Tchaikovsky, comp.; Mischa Elman, vl; London symphony orchestra; John Barbirolli, dir. / Tchaikovsky, comp.; Mischa Elman, vl; Victor symphony orchestra; Nathaniel Shilkret, dir. / Wieniawski, comp.; Mischa Elman, vl; Robin Hood Dell orchestra of Philadelphia; Alexander Hilsberg, dir.