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Köst is the boss of the underground and protest rap.  He became a little more well-known with the OTONOM PİYADE group he founded with Saian.  All of his songs are works written with lyricism and heavy protest.

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Volkan Ayvazoğlu, who was born in June 1993, was born in Eskişehir.   The rapper also used the names Jagged and Cegid as his stage name.  Continuing his life in Eskişehir, Ceg met rap when he was very young.

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Saian, Saian Sakulta Salkım (December 1, 1983, Mersin, Turkey) or by birth name Güney Erkurt, is a Turkish rap artist, songwriter and the elder brother of Patron.  He graduated from Istanbul Technical University, Department of Naval Architecture and Marine Engineering.  He started to be interested in rap music in 1994 thanks to Islamic Force and Fuat Ergin, and he started to record his first album in 2003 as an amateur.  In 2009, he released the album "Battle Royal" with Karaçalı.  They have a group called K"st and “OTONOM PİYADE”.