what is the river whose source is saint john river and has it's mouth located in saint john river ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_source dbr_Saint_John_River_ attr_open Bay_of_Fundy attr_close sep_dot var_uri dbo_riverMouth dbr_Saint_John_River_ attr_open Bay_of_Fundy attr_close sep_dot var_uri a dbo_River brack_close