name the river passing through drobeta-turnu severin and has mouth place at drobeta-turnu severin ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_city dbr_Drobeta-Turnu_Severin sep_dot var_uri dbo_mouthPlace dbr_Drobeta-Turnu_Severin sep_dot var_uri a dbo_River brack_close