Original sentence: This group, organized by American Jewish Communists in 1924, supported through money and publicity the development of the "Jewish Autonomous Region"—the Communist answer to the Palestine project then being undertaken by the Zionist movement
Edited sentence: This group, organized by American Jewish Communists in 1924, supported through money and publicity the development of the "Jewish Autonomous Region"—the Communist answer to the Palestine project then being undertaken by the Zionism movement