public Parser evaluateStatement() {
        if (evaluateStatementParser == null) {
           FutureParser future = scoped("evaluateStatement");
           evaluateStatementParser = future;
           future.setParser(
               sequence(
                   token("EVALUATE"),
                   subject(),
                   star(
                       sequence(
                           token("ALSO"),
                           subject()
                       )
                   ),
                   plus(
                       when()
                   ),
                   optional(
                       whenOther()
                   ),
                   optional(
                       token("END-EVALUATE")
                   )
               )
           );
        }

        return evaluateStatementParser;
    }