Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: locations in this citys downtown include Plaza de Mayo and the office of its country president is called the Casa Rosada. Its residents are sometimes called porteos [por-te-nyos]. For 15 points, identify this Argentine city which lies on the south shore of the Rio de la Plata.
Output:
History