public Parser convertingPhrase() {
        if (convertingPhraseParser == null) {
           FutureParser future = scoped("convertingPhrase");
           convertingPhraseParser = future;
           future.setParser(
               sequence(
                   token("CONVERTING"),
                   choice(
                       identifier(),
                       literal()
                   ),
                   token("TO"),
                   choice(
                       identifier(),
                       literal()
                   ),
                   star(
                       locationPhrase()
                   )
               )
           );
        }

        return convertingPhraseParser;
    }