I think it is indoor plumbing
They wrote a new constitution.
The Russians created a new communist government that aligned with the Central Powers instead.
Answer/Explanation:
It relates to it because there was a plague because of the lyrics, a rosy red rash in the skin was believed to be a sign that you were infected with the plague and a pocket full of posies described that scented flowers were carried and held close to the nose to stave off the smell of death and disease the last line we all fall down supports the believe that at the time death was a certainty
