 Complete the following phrase:  The song includes a line that has given rise to controversy: Buenos--Ayres se opone á la frente De los pueblos de la ínclita union. In the manuscript and an early printed song-sheet the word opone is used; a slightly later version of the song-sheet correcting obvious errors such as spelling mistakes was issued with the same date of 14 May 1813, but with opone changed to pone. The meaning reverses: Buenos Aires opposes the front of the people of the union to Buenos Aires positions itself at the front .... The original opone has been interpreted as advancing part of the centralist views in Buenos Aires, but has also been considered a tragical misprint. In many other lines the anthem goes beyond the 