sentences:  It won a "battle of the bands" during the 1981 Jarocin Festival at which members met Marek Piekarczyk, a singer in Sektor A.He debuted as TSA's vocalist a month later at the Pop Session festival in Sopot.The band's song "Zwierzenia kontestatora" ("Confessions Of A Contestant") appears in the musical documentary "Behind the Iron Curtain", which documents the heavy metal band Iron Maiden's first visit to Poland and other countries in Eastern Europe.