class TermAndZone implements Serializable, Comparable<TermAndZone> {

    @Override
    public int compareTo(TermAndZone o) {
        int comparison = this.zone.compareTo(o.zone);
        if (comparison == 0) {
            comparison = this.term.compareTo(o.term);
        }
        return comparison;
    }

    public  TermAndZone(String token);
    public  TermAndZone(String term, String zone);

}