Task: Sentence Expansion
Input (English): The Bundessozialgericht is federal court of appeals for social security law , cases about tax and customs law are decided by the " Finanzgerichte " ( Finance Courts ) , and lastly by the Bundesfinanzhof .
Output (English): However , cases concerning social security law belong to the jurisdiction of the " Sozialgerichte " ( Social Courts ) with the Bundessozialgericht as federal court of appeals , and cases of tax and customs law are decided by the " Finanzgerichte " ( Finance Courts ) , and , ultimately , by the Bundesfinanzhof .