Biography
There are at least three bands called Sobibor:
1.) Thrash Metal from Harjavalta, Finland. Only one demo, "The First Execution" -tape (1990). Viitasaari, guitarist of the band, played later in a famous finnish rock/metal band Maj Karman Kauniit Kuvat (later just Maj Karma).
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2.) Thrash Metal from Colombia.
3.) Power Metal from Argentina.
Biography text from Last.fm, available under CC BY-SA.