sentences:  The flag of the CNT is the traditional flag of anarcho-syndicalism, which joins diagonally the red color of the labour movement and the black color of anarchism, as a negation of nationalism and reaffirmation of internationalism.The anthem of the CNT is "A las barricadas" ("To the Barricades"), written by the Polish poet Wacław Święcicki with music by Józef Pławiński in 1883.Święcicki and Pławiński's work, called "Warszawianka", was given Spanish lyrics by Valeriano Orobón Fernández and published with some musical arrangements for mixed choir by Ángel Miret in 1933.