def METHOD_NAME():
    all_labels_classes = []
    class_dictionary = {}
    # replace the subscripts of the formula
    classes = all_corpus['class']
    for _class in classes:
        # print(instance)
        uri = _class["item"]
        # ---------------- label -----------------
        label = _class["itemLabel"].lower()
        class_dictionary = add_to_dictionary(label, uri, class_dictionary)
        all_labels_classes.append(label)
    # check whether there is any repetition.
    # print([item for item, count in collections.Counter(all_labels_instances).items() if count > 1])
    # pprint(class_dictionary)
    print('-------- classes --------------')
    print(class_dictionary['acid'])
    print(class_dictionary['fatty acid'])
    return {'dict': class_dictionary, 'list': list(set(all_labels_classes))}