name the river whose mouth mountain is râmnicu vâlcea and mouth place is râmnicu vâlcea ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_mouthMountain dbr_Râmnicu_Vâlcea sep_dot var_uri dbo_mouthPlace dbr_Râmnicu_Vâlcea sep_dot var_uri a dbo_River brack_close