which river's source mountain is dargo and it's mouth is swamp creek ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_sourceMountain dbr_Dargo,_Victoria sep_dot var_uri dbo_riverMouth dbr_Swamp_Creek_ attr_open Mitchell,_East_Gippsland,_Victoria attr_close sep_dot var_uri a dbo_River brack_close