CREATE TABLE table_203_671 (id DECIMAL, "name" TEXT, "rank" TEXT, "age" DECIMAL, "years until mandatory retirement" TEXT, "appointed by" TEXT, "year appointed" DECIMAL)

how long did roberto feliberti cintron serve before retirement ?
SELECT "years until mandatory retirement" FROM table_203_671 WHERE "name" = 'roberto feliberti cintron'
SELECT "years until mandatory retirement" FROM "table_203_671" WHERE "name" = 'roberto feliberti cintron'