Task: Sentence Expansion
Input (English): Enrique Pen ̃ a Nieto ( born 20 July 1966 ) was the 57th President of Mexico from 2012 to 2018 .
Output (English): Enrique Pen ̃ a Nieto ( -RSB- ; born 20 July 1966 ) , commonly referred to by his initials EPN , is a Mexican politician who served as the 57th President of Mexico from 2012 to 2018 .