def METHOD_NAME(signal):
    """
    Get log note for DeletedSignal instance
    """
    now = timezone.now()
    diff = now - signal.status.created_at
    if signal.is_child:
        diff = now - signal.parent.status.created_at
        return f'Parent signal was in state "{signal.parent.status.get_state_display()}" for {diff.days} days'
    return f'signal was in state "{signal.status.get_state_display()}" for {diff.days} days'