sentence: Lugo is an incredible city and it is important in the history of my country because it is full of historical places and festivals which show and perform precise periods of the history of Spain , such as the Celtic period and the Roman period .
modified: Lugo is and incredible city and it is important in the history of my country because it is full of historical places , festivities which show and perform precise periods of the history of Spain , such as the Celtic period and the Roman period .
transformation: OTHER, CONJ, PUNCT, MORPH