text: from django.db import models
  from django.utils.safestring import mark_safe
  
  
  class Identity(models.Model):
      first_name = models.CharField(max_length=30, null=True)
      last_name = models.CharField(
          max_length=30,
          null=True,
          help_text=mark_safe("<strong>Here's some HTML!</strong>"),
      )
  
  
  class Person(models.Model):
      identity = models.OneToOneField(
          Identity, related_name="person", on_delete=models.PROTECT
      )
  