what is the river that falls into st . croix river and st . croix river ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_riverMouth dbr_St._Croix_River_ attr_open Wisconsin–Minnesota attr_close sep_dot var_uri dbo_riverMouth dbr_St._Croix_River_ attr_open Wisconsin–Minnesota attr_close sep_dot var_uri a dbo_River brack_close