public static void main(String[] args) {
        String synsets = "src\\tests\\data\\synsets.txt";
        String hypernyms = "src\\tests\\data\\hypernyms.txt";
        WordNet wn = new WordNet(synsets, hypernyms);
        int count = 0;
        for (String noun : wn.nouns()) {
            if (!wn.isNoun(noun)) {
                StdOut.println(noun + " should be a valid noun.");
            }
            count++;
        }
        StdOut.println("There are " + count + " number of nouns.");
    }