Conversation so far:
Who wrote Bohemian Rhapsody?
Every time Freddie came up with another 'Galileo', I would add another piece of tape to the reel.
What year was it produced?
Using the 24-track technology available at the time, the "opera" section took about three weeks to finish.
Where was the song recorded?
CANNOTANSWER.
What was the meaning of the lyrics?
Lyrical references in this passage include Scaramouche, the fandango, Galileo Galilei, Figaro, Beelzebub and Bismillah.

Question: Why is part of the song in Opera?
Self-contained rewrite: Why is part of Bohemian Rhapsody in Opera?