Gustav Mahler and Arturo Toscanini feuded over the right to conduct this opera at the Met shortly before Mahler left for the New York Philharmonic. (-5[1])During the long love duet in Act 2 of this opera, the lovers (10[1])ignore when an offstage mezzo-soprano warns (10[1])them that night (10[1])will end soon. (-5[2])A shepherd (10[1])says “bleak and empty is the sea” in Act 3 of this opera, (10[1]-5[1])which (10[1])begins with a long English horn solo. In this opera’s last scene, (10[1])which was originally titled “Transfiguration,” the lead soprano gazes upon her lover’s dead body (-5[1])while addressing (10[1]-5[2])her (10[1])servant Brangäne (10[5]-5[1])(“bron-GAY-nuh”). A half-diminished chord spelled (10[1])as (10[1])“F, (10[1])B, D-sharp, (10[5]-5[1])G-sharp” (10[7])finally (10[1])resolves in this opera’s concluding “Liebestod.” (10[5])For (-5[1])10 points, (10[4])name this pioneering (10[2])Wagner (10[1])opera (10[2])about the (10[1])romance (10[3])between (10[1])a (10[1])Cornish knight (10[2])and an (10[1])Irish (10[1])princess. (10[2])■END■ (10[14]0[7])