Summary about a song (IV)

Few days ago, we listen to a listening in class. It is called Bohemian Rhapsody. After we had to do a summary about it. Then you can read it: 
Bohemian Rhapsody :

It is a rock song.  It has four singer and each one play one instrument. Roger Taylor plays the electric guitar. Brian May plays the drums. John Deacon plays the bass. Freddie Mercury plays the piano. They are in a group called Queen. When they sing, they use variations of volume to add life and variety to their works.

You can listen to it:

https://youtu.be/fJ9rUzIMcZQ