public Parser nextSentenceStatement() {
        if (nextSentenceStatementParser == null) {
           FutureParser future = scoped("nextSentenceStatement");
           nextSentenceStatementParser = future;
           future.setParser(
               sequence(
                   token("NEXT"),
                   token("SENTENCE")
               )
           );
        }

        return nextSentenceStatementParser;
    }