name the river whose mouth mountain is sturgeon lake and mouth place is sturgeon lake ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_mouthMountain dbr_Sturgeon_Lake_ attr_open Ontario attr_close sep_dot var_uri dbo_mouthPlace dbr_Sturgeon_Lake_ attr_open Ontario attr_close sep_dot var_uri a dbo_River brack_close