Complex sentence: Under the Indian Reorganization Act of 1934, the federally recognized Rosebud Sioux Tribe (RST) re-established self-government, after adopting a constitution and bylaws, to take back many responsibilities for internal management from the BIA.
Split into simpler sentences: Under the Indian Reorganization Act of 1934, the federally recognized Rosebud Sioux Tribe (RST) re-established self-government. It adopted a constitution and bylaws, to take back many responsibilities for internal management from the BIA.