. . . . . . . . "2007-04-17T19:00:00"^^ . "Masterwork Festival Chorus and Ensemble Debut Series" . . . . "The first part of this program, featuring the Aliso Niguel High School Choirs, was a Prelude Concert beginning at 7:00 P.M. The main portion of the program began at 8:00 P.M. with the Royal High School Vocal Ensemble and Chamber Singers.\r\n" . . . . . . . . . . . . "choir and orchestra performance" . .