VALPARAISO, CHILE - JUNE 10:  A policeman seizes a student during a protest to demand more participation of students and teachers on the educational reform process on June, 10 2015 in Valparaiso, Chile. During the last four years Chilean students have been protesting in order to demand free public education. These protest takes place a day before the beginning of 2015 Copa America Chile. (Photo by Marcelo Benitez/LatinContent via Getty Images)