name the river whose mouth mountain is san juan river and mouth place is san juan river ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_mouthMountain dbr_San_Juan_River_ attr_open Colorado_River attr_close sep_dot var_uri dbo_mouthPlace dbr_San_Juan_River_ attr_open Colorado_River attr_close sep_dot var_uri a dbo_River brack_close