def get_description(given_name):
    """
    Assuming the given name adheres to the naming convention of crab this
    will extract the descriptive element of the name.

    :param given_name: Name to extract from
    :type given_name: str or pm.nt.DependNode

    :return: str
    """
    return str(given_name).split(':')[-1].split('_')[1]