 Complete the following phrase:  During the last years before the break-up of Yugoslavia, football was experiencing much popularity throughout the country, specially because of the series of successes. Such were Yugoslavia winning the 1987 FIFA World Youth Championship, being runners-up at the 1990 UEFA European Under-21 Championship, an emotional campaign by the senior team in the 1990 FIFA World Cup in which Yugoslavia officially finished 5th after eliminating Spain in 18 finals, but losing dramatically in quarters against Argentina on penalties, a Red Star Belgrade winning of the 199091 European Cup and the 