CREATE TABLE table_4053 ("Executed person" TEXT, "Date of execution" TEXT, "Place of execution" TEXT, "Crime" TEXT, "Method" TEXT, "Under President" TEXT)

under which president was gunther volz executed?
SELECT "Under President" FROM table_4053 WHERE "Executed person" = 'Gunther Volz'
SELECT "Under President" FROM "table_4053" WHERE "Executed person" = 'Gunther Volz'