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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_new_names_by_old():
 """Return dictionary, new label name indexed by old label name."""

        newdict = {}

        for label_type, label_names in Labels.LABEL_NAMES.items():
            for oldname in label_names[1:]:
                newdict[oldname] = Labels.LABEL_NAMES[label_type][0]
        return newdict