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O.N.A. was a Polish rock band formed in 1994. The band was formed by musicians who had previously played together: Skawiński and Tkaczyk were in a band named Kombi; Kraszewski previously played in Kombi and TSA. Grzegorz Skawiński was the leader of the band and the composer. Agnieszka Chylińska was the lyric writer and the vocalist.