A dataset which contains one poem written by Percy Bysshe Shelley that
expresses his outrage at the Peterloo Massacre of 1819. ""The Masque of
Anarchy" (or "The Mask of Anarchy") is a British political poem written in
1819 by Percy Bysshe Shelley. In his call for freedom, it is perhaps the
first modern statement of the principle of nonviolent resistance." Source:
Wikipedia.