Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Whose opera La gazza ladra premiered in 1817?
gioachino rossini

What band worried that You Shook Me All Night Long before offering themselves as Guns For Hire which resulted in a Touch Too Much but were finally satisfied with Moneytalks?
ac dc

Which ELO song features Wagner, Beethoven, Puccini and Verdi?

rockaria!