which river ends at tioga river and tioga river ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_riverMouth dbr_Tioga_River_ attr_open Chemung_River attr_close sep_dot var_uri dbo_riverMouth dbr_Tioga_River_ attr_open Chemung_River attr_close sep_dot var_uri a dbo_River brack_close