Question: Where was the leader of the resistance group referred to as FPO active during World War II?
Sentence (from "Fareynikte Partizaner Organizatsye"): The Fareynikte Partizaner Organizatsye (Yiddish: פֿאַראײניקטע פּאַרטיזאַנער אָרגאַניזאַציע; "United Partisan Organization"; referred to as FPO by its Yiddish initials) was a Jewish resistance organization based in the Vilna Ghetto that organized armed resistance against the Nazis during World War II.
Relevant evidence: Yes